Re-organise the Pax Exam IT infrastructure

- Move parent pom to commons/integrationtest
- Move paxexam to integrationtest
- Change IT packages to be outside of system under test
- Add ConfigurationBundles to simplify creating new tests
- Use a common base class for Pax Exam based IT

Change-Id: Iefb2e3d7b0de2184d78b547ef2eb3b70ce686ce3
Signed-off-by: Dave Tucker <djt@redhat.com>
Merge "Re-organise the Pax Exam IT infrastructure"