Merge branch 'master' into sqlcoverage-next

Conflicts:
	tests/frontend/org/voltdb/planner/TestPlansJoin.java
Merge branch 'master' into sqlcoverage-next
ENG-3038 tweaks to index filter handling as it feeds equivalence/partitioning checks
Merge branch 'master' into sqlcoverage-next
Merge remote-tracking branch 'origin/sqlcoverage-next' into sqlcoverage-next

Conflicts:
	src/frontend/org/voltdb/planner/ParsedUnionStmt.java
	tests/frontend/org/voltdb/planner/TestPlansJoin.java