Remove nodeKind member from ExprTree, and replace it with a pure virtual method #3457
that all of the derived classes must implement. parent ticket #2541
Remove data members from classad Operation class, and create subclasses by arity #3457 parent ticket #2541
each subclass of Operation class will have only the necessary data members, so we don't waste space for
2nd & 3rd ExprTree pointers in nodes that have no need of them.
===VersionHistory:Pending===
Merge branch 'V7_9-classad_shrinkage'
Merge branch 'master' of ingwe:/p/condor/repository/CONDOR_SRC