Add 3 integration tests (ITs) for version classes

The scenarios tested are:

1. Verify that version numbers work correctly, if the corresponding
   Xalan modules are on the regular class path.
2. Verify that version numbers work correctly, if the corresponding
   Xalan modules are on the bootstrap class path.
3. Verify that version numbers work correctly, if the corresponding
   Xalan modules are relocated to different package names inside a
   shaded JAR and on the bootstrap class path.
12 files changed