Add xsd:enumeration support to wstools

Generate the artifacts for this test case. Make sure the round trip works.
Create a seperate tools test if the artifacts are not generated by the testrun

tdiesler@TDDELL /cygdrive/d/cvs/jboss-head/testsuite
$ ant -Dtest=org.jboss.test.webservice.jbws231.JBWS231TestCase one-test

one-test:
[junit] Running org.jboss.test.webservice.jbws231.JBWS231TestCase
[junit] Tests run: 2, Failures: 0, Errors: 0, Time elapsed: 4.734 sec