PHOENIX-982 Avoid spinning up and tearing down mini cluster in tests (SamarthJain)
PHOENIX-985 performance.py script fails to execute queries
PHOENIX-987 Add missing @Category info to tests
PHOENIX-986 Better err message for CSV import

Supply a more clear error message for the CSV import if the
supplied table name does not match an existing table name.
Merge Apache 4.0
Merge from Apache 4.0