* switch default hasTroves to raise NotImplementError instead of saying that it does not have any troves. * fix handling of non-recursive changesets by ensuring all of the transitive closure of the group is available   when calling mergeGroupCollection.  
* switch default hasTroves to raise NotImplementError instead of saying that it does not have any troves.
* fix handling of non-recursive changesets by ensuring all of the transitive closure of the group is available
  when calling mergeGroupCollection.  


sassoftware/conary,sassoftware/conary,sassoftware/conary,sassoftware/conary,sassoftware/conary