Add optional tolerance format to expected resultsThe expected outputs file lines now end with ":::", which can optionally
be followed with an override relative tolerance value that will only
be applied to that line. The default relative tolerance (set in
regression-tester.py) applies to all other values.
Merge pull request #2 in PIPE/pipeline-testdata from update-readme-on-the-casa-datapath-order to main* commit '4b7e6178ce324505e783ab63c0f3b256dfc89d66':
work around CAS-13281, which might crash tclean
Merge pull request #1 in PIPE/pipeline-testdata from update-readme-with-new-testdir to main* commit 'd756ab8dcd9eb13dbe8393f957e3082961ec1969':
Changed 'unittest' to 'pl-unittest' in readme example.