TestNG Run all class methods multiple times preliminary doing @BeforeClass with supplied data

Attempt1.java

import java.io.FileInputStream;
import java.io.IOException;
import java.util.Properties;
import org.openqa.selenium.By;
import org.openqa.selenium.Cookie;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.testng.Assert;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;

/**
 * Encapsulates tests for Calendar module.
 * 
 * Dependent properties:
 * * siteURL: URL of the webapp
 */
@Test(dataProvider="getUsersIdAndName")
public class CalendarTest {

    static private WebDriver driver;
    static private Properties props;

    @BeforeClass
    public static void setUpClass() throws Exception {

        // Loading properties
        props = new Properties();
        try {
            // Load a properties file
            props.load(new FileInputStream("config.properties"));
        } catch (IOException ex) {
            // ToDo Implement proper logging
            System.err.println(ex.getMessage());
        }

        // Initializing webdriver
        driver = new FirefoxDriver();

    }

    @AfterClass
    public static void tearDownClass() throws Exception {

        // Close the browser
        driver.quit();

    }

    /**
     * Data provider method that supplies IDs and names of all users in the system.
     * 
     * @return array of int (ID) and String (userName)
     */
    @DataProvider
    public static Object[][] getUsersIdAndName() {

        // ToDo Replace with exctraction from DB
        return new Object[][] {
            {1, "admin"},
            {5, "user"}
        };

    }

    /**
     * Tests that authentication with given credentials succeeded.
     * 
     * Dependent properties:
     * * siteURL: URL of the webapp
     * 
     * @param userID user ID in database 
     * @param userName login of the user
     */
    @Test
    public static void isAuthenticated(int userID, String userName) {

        // Logging in
        driver.get( props.getProperty("siteURL") );
        WebElement loginField = driver.findElement(By.name("user_name"));
        WebElement passwordField = driver.findElement(By.name("user_password"));
        loginField.sendKeys( userName );
        // For testing purposes all passwords match logins
        passwordField.sendKeys( userName );
        loginField.submit();

        /*
         * Checking that we've authenticated successfully.
         * There is a cookie holding the ID of authenticated user.
         */
        Cookie loginID = driver.manage().getCookieNamed("ck_login_id");
        Assert.assertEquals(Integer.parseInt( loginID.getValue() ), userID);

    }

}

Attempt2.java

import java.io.FileInputStream;
import java.io.IOException;
import java.util.Properties;
import org.openqa.selenium.By;
import org.openqa.selenium.Cookie;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.testng.Assert;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;

/**
 * Encapsulates tests for Calendar module.
 * 
 * Dependent properties:
 * * siteURL: URL of the webapp
 */
@Test(dataProvider="getUsersIdAndName")
public class CalendarTest {

    static private WebDriver driver;
    static private Properties props;

    @BeforeClass
    public static void setUpClass() throws Exception {

        // Loading properties
        props = new Properties();
        try {
            // Load a properties file
            props.load(new FileInputStream("config.properties"));
        } catch (IOException ex) {
            // ToDo Implement proper logging
            System.err.println(ex.getMessage());
        }

        // Initializing webdriver
        driver = new FirefoxDriver();

    }

    @AfterClass
    public static void tearDownClass() throws Exception {

        // Close the browser
        driver.quit();

    }

    /**
     * Data provider method that supplies IDs and names of all users in the system.
     * 
     * @return array of int (ID) and String (userName)
     */
    @DataProvider
    public static Object[][] getUsersIdAndName() {

        // ToDo Replace with exctraction from DB
        return new Object[][] {
            {1, "admin"},
            {5, "user"}
        };

    }

    /**
     * Tests that authentication with given credentials succeeded.
     * 
     * Dependent properties:
     * * siteURL: URL of the webapp
     * 
     * @param userID user ID in database 
     * @param userName login of the user
     */
    @Test(dataProvider="getUsersIdAndName")
    public static void isAuthenticated(int userID, String userName) {

        // Logging in
        driver.get( props.getProperty("siteURL") );
        WebElement loginField = driver.findElement(By.name("user_name"));
        WebElement passwordField = driver.findElement(By.name("user_password"));
        loginField.sendKeys( userName );
        // For testing purposes all passwords match logins
        passwordField.sendKeys( userName );
        loginField.submit();

        /*
         * Checking that we've authenticated successfully.
         * There is a cookie holding the ID of authenticated user.
         */
        Cookie loginID = driver.manage().getCookieNamed("ck_login_id");
        Assert.assertEquals(Integer.parseInt( loginID.getValue() ), userID);

    }

}

Attempt3.java

import java.io.FileInputStream;
import java.io.IOException;
import java.util.Properties;
import org.openqa.selenium.By;
import org.openqa.selenium.Cookie;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.testng.Assert;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;

/**
 * Encapsulates tests for Calendar module.
 * 
 * Dependent properties:
 * * siteURL: URL of the webapp
 */
@Test(dataProvider="getUsersIdAndName")
public class CalendarTest {

    static private WebDriver driver;
    static private Properties props;

    /**
     * Tests that authentication with given credentials succeeded.
     * 
     * Dependent properties:
     * * siteURL: URL of the webapp
     * 
     * @param userID user ID in database 
     * @param userName login of the user
     */
    @BeforeClass
    @Test(dataProvider="getUsersIdAndName")
    public static void isAuthenticated(int userID, String userName) throws Exception {

        // Loading properties
        props = new Properties();
        try {
            // Load a properties file
            props.load(new FileInputStream("config.properties"));
        } catch (IOException ex) {
            // ToDo Implement proper logging
            System.err.println(ex.getMessage());
        }

        // Initializing webdriver
        driver = new FirefoxDriver();

        // Logging in
        driver.get( props.getProperty("siteURL") );
        WebElement loginField = driver.findElement(By.name("user_name"));
        WebElement passwordField = driver.findElement(By.name("user_password"));
        loginField.sendKeys( userName );
        // For testing purposes all passwords match logins
        passwordField.sendKeys( userName );
        loginField.submit();

        /*
         * Checking that we've authenticated successfully.
         * There is a cookie holding the ID of authenticated user.
         */
        Cookie loginID = driver.manage().getCookieNamed("ck_login_id");
        Assert.assertEquals(Integer.parseInt( loginID.getValue() ), userID);

    }

    @AfterClass
    public static void tearDownClass() throws Exception {

        // Close the browser
        driver.quit();

    }

    /**
     * Data provider method that supplies IDs and names of all users in the system.
     * 
     * @return array of int (ID) and String (userName)
     */
    @DataProvider
    public Object[][] getUsersIdAndName() {

        // ToDo Replace with exctraction from DB
        return new Object[][] {
            {1, "admin"},
            {5, "user"}
        };

    }

}

Final solution is here:
https://gist.github.com/4262704