This patch implements the new intermediate results standard and adds the mechanisms required to handle it. Results validation is done with jsonschema and some manual validation (because of some unfortunate issues with jsonschema) and some tests were implemented to ensure that we fail/pass where expected. The metrics modules were modified to handle multiple suites.
One thing that is disabled in this patch is the subtest/single-metric specifications through the "results" field. We'll do one thing at a time here and we also have no use for subtests yet (although we definitely will).
Differential Revision: https://phabricator.services.mozilla.com/D72067
Gregory Mierzwinski
Tarek Ziadé