Merge pull request #163 in CASA/casa6 from CAS-13078 to master
* commit 'a5e9755edf2a8f6c16caecbc7d276b9e9b6a95d2':
Update casaplotms and casaviewer version
update build.conf (CAS-13078)
add --datapath parameter to casaplotms (CAS-13078)
add --datapath parameter to casaviewer (CAS-13078)