STYLE: Reduced debug messages related to subject hierarchy

Didn't delete them, just commented out, so that they can be restored when debugging plugin ownership changes and other issues.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23405 3bd1e089-480b-0410-8dfb-8563597acbee
ENH: move duplicated code into volumes logic

Both the Editor and LabelStatistics modules had code to check
that volume geometry matched for a label map.  The duplicated
code is removed and there is a test in LabelStatistics.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23406 3bd1e089-480b-0410-8dfb-8563597acbee