iterate thru test steps and add header to each of them

iterateTestSteps.groovy

import groovy.json.JsonSlurper;
import com.eviware.soapui.support.types.StringToStringMap; 

//get the response from the test step that makes the call to get the authentication token
def authResponse = testRunner.testCase.getTestStepByName("GetToken").getPropertyValue("response");

//parse the json response
def authResponseJSON = new JsonSlurper().parseText(authResponse);

//access the access_token property in the respose
def oauthToken = authResponseJSON.access_token;

//create a new empty map for headers
def headers = new StringToStringMap();

//create a key value pair in the headers mao
headers.put("OAuth-Token", oauthToken);

//obtain the list of test steps
def steps = context.testCase.getTestStepList(); 

//iterate thru each of the test steps and set the oauth token to each of the steps
steps.each{
	// This block will loop through the test steps and set headers for each of them
	if (it.name != 'GetToken' && it.name != 'TransferOauthToken')
		it.testRequest.setRequestHeaders(headers);
}