Merge pull request #450 in CASA/casa6 from CAS-13491 to master
* commit 'd2614b6a5929b14c2a973fe5f45ca572868283f3':
Add 'pytest' as a dependency to casatestutils
Update Fetch and Gather functions to include tests from plotms, regression and almatasks
Updates to runtest for use with casashell. Sync CASA5 / CASA6 casatestutils
Update to setup.py to copy runtest.py to casatestutils at build time. Remove unnecessary variables in runtest.py
Remove Unused python varaiables
Merge pull request #449 in CASA/casa6 from CAS-13588 to master
* commit '9473e203aa02d6ef28a5a46c814d8901c86d1d1b':
Updated alma stakeholder tests and added almastktestutils to casa5 to synchronize with casa6
