TrigValTools: Skip prmon output analysis if the required python imports fail
This is a workaround for the issue reported in ATLINFR-3486 which is actually caused by ATLINFR-3417. Namely, there is a crash when importing numpy because of missing library in athena installation.
Just to have a quick solution, I'm submitting a workaround for trig-test-json.py
here to simply skip the prmon output analysis if any of the modules it requires cannot be imported. Normally, this shouldn't be needed, but it provides a quick fix and also makes the script more robust in case similar issues happen in the future.