Merge pull request #407 in CASA/casa6 from CAS-13428 to master
* commit '5401d715029ecd530e9e8f0c0674942c7febff8a':
Enable read only cfcache for tclean(gridder='awproject').
Merge pull request #143 in CASA/casa-pkg from CAS-13502 to master
* commit '1eb58cc12ad25f6035fa4fee6e2a92f859603b21':
Add test_msmetadata to casa5 test suite