Add test cases to verify configuration is not supplied twice in the
following scenario:

  * Register service with pids p1, p2
    -> Expect callbacks for p1 and p2
    
  * Update service registration with pids p2, p3
    -> Expect call for p3 only
       (p2 has already been supplied before)

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1451589 13f79535-47bb-0310-9956-ffa450edef68