Merge pull request #3 in CASA/casaviewer from CAS-12970 to master
* commit '8c2fc499d36e412c1e86f99c1eeae26448b71d02':
switch casa-source to master (CAS-12970)
update submodule ref (CAS-12970)
version number substitution is still required (CAS-12970)
adjust/unadjust no longer needed (CAS-12970)