Backed out 2 changesets (bug 1585410) for causing failures in...

Backed out 2 changesets (bug 1585410) for causing failures in test_TelemetryController.js CLOSED TREE

Backed out changeset 5205263485b6 (bug 1585410)
Backed out changeset 2f9292f4fbd1 (bug 1585410)

--HG--
rename : toolkit/components/telemetry/docs/obsolete/optout-ping.rst => toolkit/components/telemetry/docs/data/optout-ping.rst
rename : toolkit/components/telemetry/tests/marionette/tests/client/test_deletion_request_ping.py => toolkit/components/telemetry/tests/marionette/tests/client/test_optout_ping.py