Merge pull request #497 in CASA/casa from CAS-11262-2 to master
* commit 'd888ff33b102c6b34252c153de1c06aab7e7f825':
Fixed typo in MPIClient() call. Added also a check if mpi is enabled so that it only goes through parallel section if mpicasa is used. This will force running through an MMS as a monolithic MS when casa is not started with mpicasa. Still need to verify tests.
