[autotest] Redirect reverification of hosts.

All reverifications sent to the master through the
frontend or otherwise will get redirected to hosts
on shards.

TEST=Reverified hosts through the frontend of the master.
BUG=chromium:423225
DEPLOY=apache

Change-Id: I66e242d4987a35e7aefd204d280371d3bdfb68a2
Reviewed-on: https://chromium-review.googlesource.com/236172
Reviewed-by: Dan Shi <dshi@chromium.org>
Reviewed-by: Prashanth B <beeps@chromium.org>
Commit-Queue: Prashanth B <beeps@chromium.org>
Trybot-Ready: Prashanth B <beeps@chromium.org>
Tested-by: Prashanth B <beeps@chromium.org>
1 file changed