- remove test_provenance_content_find_all(), now we have the new version of this in test_provenance_heuristics.py.
Also test this later with an ArchiveStorage in addition to the default ArchivePostgreSQL class.
- Parametrize the archive() test fixture to test both Archive implementations aka. both the ArchiveStorage ans the ArchivePostgreSQL ones.
- Remove test_provenance_add_revision it's superseeded by test_provenance_heuristics.