Add xdb.jar and xmlparserv2.jar to "compile.server.path" in eclipselink.jpa.test/build.xml to resolve the issue that xmlparserv2.jar can't be under WAS_INSTALL/lib/ext when running customfeatures test model on WebSphere.
Add xdb.jar and xmlparserv2.jar to "compile.server.path" in eclipselink.jpa.test/build.xml to resolve the issue that xmlparserv2.jar can't be under WAS_INSTALL/lib/ext when running customfeatures test model on WebSphere.

Code Reviewed By: Kevin Yuan


Former-commit-id: 7cab06969d16fcf2ef5b3bf8ef05623dbdfc84fb
bfg-repo-cleaner-demos/eclipselink.runtime-bfg-strip-big-blobs,bfg-repo-cleaner-demos/eclipselink.runtime-bfg-strip-big-blobs,bfg-repo-cleaner-demos/eclipselink.runtime-bfg-strip-big-blobs