#757 Test models produced by CIF to CIF integration tests are checked for being valid
requested to merge 757-test-models-produced-by-cif-tools-in-integration-tests-for-being-valid into develop
- Best to review per commit.
- I started with only CIF to CIF tests. If we agree this is good, I'll do the other ones as well, in the same way.
- Changes are inspired by CIF data-based synthesis tests, which already are multi-step tests.
Addresses #757