Merge in CASA/casa6 from CAS-14036 to master
* commit '9175676946c120684a260d0cb63d3dd96f42b565':
Added a parameter to control the creation of Multi-MS when running with mpi.
Added new vla stakeholder test to component mapping json file for automated tests.
Added missing self.parallel
Fixed weblog runtime entry and cleaned up a few doc strings.
Initial version for the VLA Users Continuum Stakeholders tests.
