gistfile1.xml

    <plugins>
      <plugin>
        <groupId>org.apache.openejb.maven</groupId>
        <artifactId>tomee-maven-plugin</artifactId>
        <version>1.0.1-SNAPSHOT</version>
        <configuration>
          <args>-Xmx1024m -XX:MaxPermSize=256m</args>
          <removeDefaultWebapps>true</removeDefaultWebapps>
          <zip>false</zip>
          <libs>
            <lib>com.liferay.portal:portal-service:6.1.1</lib>
            <lib>com.liferay.portal:support-tomcat:6.1.1</lib> <!-- mandatory ? -->
            <lib>portlet-api:portlet-api:1.0</lib>
          </libs>
          <webapps>
            <webapp>com.liferay.portal:portal-web:6.1.1?name=ROOT</webapp>
          </webapps>
        </configuration>
      </plugin>