Merge pull request #453 in CASA/casa6 from CAS-13599 to master
* commit '78c330c6a99b75f17041258e5c74e33f94d24c9f':
update casacore to current github trunk Aug 25 2021 (CAS-13599)
Merge pull request #452 in CASA/casa6 from CAS-13037 to master
* commit 'ef1eb530caa5a7144cf38467f2ca26c7f68ac162':
added descriptions for the test cases
Added a test case comparing to reference file
Added additional test cases
added some test cases for selection parameters of listcal