Merge pull request #2660 from RosettaCommons/roccomoretti/integration_test_meta_flag
Add an "integration test" meta flag
To avoid issues where people forget certain flags which results in non-constant output in the integration test, and to make it more obvious to external users which flags they *shouldn't* be using, I've created a new -testing:INTEGRATION_TEST meta option which enables flags for integration test purposes. (Unless those options are explicitly disabled on the commandline)