Commits
Merge pull request #149 in CASA/casa6 from CAS-13041 to master
* commit '7a7161da199260090adc74976157bfefebb0bf91': Add updates from imagetesthelpers.py CASA6 to CASA5 use done() rather than close(), CAS-13041 release coordsys objs also in casatestutils, CAS-13041 bring testhelper_imager (release coordsys) updates to casa6, CAS-13041 release coordsys objs, CAS-13041