ENG-5616 fix indexing of self-joins
Merge branch 'master' into ENG-5616-selfjoins
Merge branch 'master' into ENG-5616-selfjoins
Merge remote-tracking branch 'origin/ENG-5616-selfjoins' into ENG-5616-selfjoins
Merge branch 'master' into ENG-5616-selfjoins
Fix for ENG-5816 NPE with test case.
ENG-5616 Confirm group by fix with new test case
Merge branch 'master' into ENG-5616-selfjoins
Also refresh plannertester baseline.
Conflicts:
	src/frontend/org/voltdb/planner/ParsedSelectStmt.java
	src/frontend/org/voltdb/planner/PlanAssembler.java
	tests/frontend/org/voltdb/planner/TestPlansGroupBy.java
	tests/frontend/org/voltdb/planner/TestSelfJoins.java
Merge pull request #1109 from VoltDB/ENG-5616-selfjoins

ENG-5616 fix indexing of self-joins and grouping based on index ordering