Backed out 4 changesets (bug 1570792, bug 1593358, bug 1575905) for causing bug 1593402 to near permafail. CLOSED TREE

Backed out changeset 43490702945f (bug 1593358)
Backed out changeset cf2f28971e64 (bug 1570792)
Backed out changeset 67f284b0e4c2 (bug 1575905)
Backed out changeset 13d8e61774f1 (bug 1575905)

--HG--
extra : amend_source : 9541e3e941e7b62095715bb4859991bd48ea0489
extra : histedit_source : 51dd3724c2e8b806b2c9e531aa14119ff38f37e4