ACE-4463 - make sure DA does not try to install DPs with non-unique resources.

- added checks during the creation of an AbstractDeploymentPackage;
- added itests verifying this behaviour for bundles.



git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1581302 13f79535-47bb-0310-9956-ffa450edef68