Merge pull request #77 in CASA/casa6 from CAS-12892-1 to master
* commit '8c0375a938c56cfa6494b9065afa01ce9f27ae37':
numpy needed by gotasks (PIPE-563,CAS-12892)
Merge pull request #76 in CASA/casa6 from CAS-7063 to master
* commit '176d7bf59b125f42f495f0e408628cd119ccdf55':
Remove remove_ref_undef option from importasdm and turn off build of fixspwbackport executable in CASA 5 builds