Run Pax Exam IT with latest artifacts

This change uses the latest artifacts in the Pax Exam ITs.
Currently, these tests will fail until the both the plugin and
northbound bundles have been migrated to the new library.

Change-Id: Ie8d1d52ca671fb06cebd5799c0462faee5aef2d6
Signed-off-by: Dave Tucker <djt@redhat.com>