BUG: MRMLDisplayableGroup - After the group catched the DisplayableManagerFactoryRegisteredEvent make sure the MRMLViewNode and the Create method of the DisplayableManager are called.

This is a "quick/dirty" fix allowint the Annotation module folks to progress...
Note that the test vtkMRMLCameraDisplayableManagerTest1 has now leaks.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@14116 3bd1e089-480b-0410-8dfb-8563597acbee