Merge pull request #117 in CASA/casa6 from CAS-12905 to master
* commit 'aaec8902fff1b96adf7c44af1b8986c679572908':
renamed test_visstat to test_req_task_visstat
Merged new test into test_visstat.py
edited CMakeLists and unittests_list to remove the old test_visstat
Renamed to test_req_visstat.py
Merged into test_visstat and removed req test