Move clustering test support classes to jboss-test

The org.jboss.test.JBossClusteredTestCase, JBossClusteredTestServices and JBossClusteredTestSetup classes should be moved out of the testsuite module and into test. They are just utility classes to support deployment to more than one AS instance and exposure to test clients of more than one JNDI URL and base HTTP URL. EJB3 uses them as well, so they need to be in a binary to allow EJB3 to decouple from the AS.

This should be done on both trunk and Branch_4_2.