Merge pull request #227 in CASA/casa6 from CAS-13074 to master
* commit '0a1ea588714fd5b4d94a08587677a99993506aab':
Update build.conf viewer version
Update viewer branch wheel
Update casaviewer branch version
update test description
add test_ICRS to to test_rg_fromtextfile
test bug fixes
make test_rg_fromtextfile.py the same file in CASA 5 and 6
Add ICRS to supported CRTF region direction frames