Fix OSGi integration tests

Fixes the following items:
  * brooklyn.management.osgi.OsgiStandaloneTest
      o testDuplicateBundle
      o testRemoteDuplicateBundle

Depends on #240 
We should also mark this with `// BROOKLYN_VERSION` at the end of the line, so that it gets incremented to `0.8.0-SNAPSHOT` etc automatically as part of our release process.