MAR test should mimick "mar build/mar run"
Instead of using tags, we should be able to run MAR test like this:
# With remote repository
mar test --machine=<MACHINE_CONF> --experiment=<EXPERIMENT_CONF> --expecution-nestor=<EXECUTION_CONF> --expecution-mar=<EXECUTION_CONF> [--only-build] ... commit url etc.
# Or local changes
mar test <PATH_TO_REPO> ....