Pull request #696: CAS-13827 for targetres=True, write requested, not fitted, beam to metadata
Merge in CASA/casa6 from CAS-13827 to master
* commit 'a0c6af29ee53f8f07c7bb7c5450b2eaced00da32':
updated GaussianBeam construction issues, casacore types -> C++ primitives
add test to verify correct beam is place in metadata
change log priority of new messages from INFO to WARN CAS-13827, for targetres=True, write requested, not fitted, beam to metadata