Provide testcase for jboss-modules enabled clients

We need a testcase for verifying module dependencies requirements when running out-of-container jboss-modules enabled clients:

java -jar $JBOSS_HOME/jboss-modules.jar -mp $JBOSS_HOME/modules -jar client.jar

The manifest in client.jar is expected to just contain the javax.xml.ws.api and javax.jws.api modules (perhaps plus logging) when using plain jaxws only. Another test should verify the org.jboss.ws.cxf.jbossws-cxf-client is enough (for those lazy users willing to use anything from jbossws-cxf and not spend time of figuring out all the required modules... )