[PierreRaybaut]

Companion of DataLab-Platform/Sigima#88 (closes DataLab-Platform/Sigima#87), same branch name so that the CI tests both together.

Summary

Sigima 1.4 increases to version 2 the contracts of the operations whose result changed for some inputs, among which sigima.signal.difference, average and signals_to_image. Activities recorded with version 1 are now refused explicitly (unsupported_contract) instead of being replayed and reported as different.

The provenance tests hard-coded version 1. They now:

• expect the activities recorded in the session at the local contract version, replayed exactly (all of them, in the families round trip);
• expect the reference files of both editions (recorded with version 1) to be refused explicitly, without computation (provenance_*_difference.h5, activities of provenance_*_families.h5 whose contract changed);
• check that a call recorded with version 1 (provenance_web_difference.h5) is described but not applied again; 2-to-1 re-application stays covered by test_difference_keeps_source_and_operand (calls recorded in the session).

No change to DataLab itself. The reference files are kept as they are: they now check the explicit refusal of earlier recordings. DataLab-Web will have to write its reference files again when it moves to Sigima 1.4.

Tests

datalab/tests/features/common and datalab/tests/features/hdf5 with Sigima fix/contract-versions-1.4 and DataLab-Capsule develop: 508 passed.