Bug 913113: Add a test step to the jetpack test suite to run testaddons. r=armenzg
Backing out changeset 38f2f14483ec from bug 913113.
Bug 912706, increase maxCount upload lock, r=catlee
Bug 910916 - Allow platform-specific mozharness repo and tag for easier testing, and implement try_by_default for mozharness builders, r=aki

--HG--
extra : rebase_source : a8fdbcda52f1923094db038f124e200441a15a49
Bug 913113: Add a test step to the jetpack test suite to run testaddons. r=armenzg