Commits
Merge pull request #141 in CASA/casa6 from CAS-12638 to master
* commit '58ed1307a5767cad67d2949d7b1a179dbb943724': CAS-12638 : Copy py files from casa5 to casa6 places in the code tree CAS-12638 : More fixes plus a new pair of test programs CAS-12638 : Fixed three different error conditions. (1) latpole error when a serial run followed a parallel one (2) latpole error when output of multi-stage parallel run was sent to impbcor (3) parallel + serial savemodel complained about .psf and .residual not found.