Commits
Merge pull request #877 in CASA/casa from CAS-12282 to master
* commit '054a1899f187a5d45f2046a466d42847dbcbc63c': test_helper imports for CASA 5/6, tool names, paths, Python 3 issues, CAS-12282 CASA 5/6 tool names in helper, CAS-12282 Python 3 compat and imports for Python 2/3 - CASA 5/6, CAS-12282 replace argsort with lexsort by (#rows, then scan, thenddi) as per CAS-12025, CAS-12282 split chunk buildScanDDIMap() from getPartitionMap, CAS-12282