Merge pull request #508 in CASA/casa6 from CAS-13629 to master
* commit '567bd64fdb833687e38c22c671159b1781204720':
add import os
Updated using scastro's suggestion.
remove remaining CASA 5 reference CAS-13629 commit for fix of DirectionCoordinate::makeFourierCoordinate CAS-13629 add test_new_inc(), remove CASA 5 stuff, delete created files