ENG-4826 matview index initial change set -- may be a slight overreach.
Merge branch 'master' into ENG-4826-matview-index-hsql

Conflicts:
	tests/ee/execution/engine_test.cpp
ENG-4826 disallow unique matview indexes ++
Merge branch 'master' into ENG-4826-matview-index-hsql
ENG 4826 indexed mat views passing junit test
Merge branch 'master' into ENG-4826-matview-index-hsql
minor cleanup
Merge pull request #708 from VoltDB/ENG-4826-matview-index-hsql

Eng 4826 matview index hsql