Bug 973491 - port MockReset to mozharness, r=rail
Bug 973492 - allow for multiple basedirs to be passed to PurgeMixin.purge_builds(), r=armenzg
Bug 973493 - allow mozharness's tbox_print_summary() to be used outside of unittests, r=armenzg
Bug 974777 - add --dump-config and --dump-config-hierarchy to mozharness, r=rail
Bug 974777 - add --dump-config and --dump-config-hierarchy to mozharness -- nosetests, r=rail
Merge default->production

--HG--
branch : production