Update benchmarks

• add regression test on the gflops
• add -test jube files to test on minimalist cases
• improve errors handling

added 5 commits

• 51119958...f1dea62a - 4 commits from branch solverstack:master
• dff21c1a - Update benchmarks:

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approved this merge request

mentioned in commit 67dd9589

merged

changed milestone to %Chameleon 1.3.0