Merge pull request #1117 in CASA/casa from CAS-12688 to master
* commit '2f70d6149449f9ef22e64d848935f8e1d490c263':
Made changes to apply cal for the spwmapMulti case and flagbackup
Minor error in comments fixed
Added several new tests (accor, applycal, fixplanets, fluxscale, listsdm, rmfit) and updated the CMakeLists/unittests_list files