Added key version incrementing to loops.
Added key version incrementing to loops.

Completing the TODO was blocked by https://gerrit.chromium.org/gerrit/#/c/32458

BUG=None
TEST=Ran it

Change-Id: I4126b02f8b6658378e3cf8ed69082d6628d94668
Reviewed-on: https://gerrit.chromium.org/gerrit/33584
Tested-by: Kris Rambish <8a1e16570749310c5add42ae1efec654b4ce43a0@chromium.org>
Reviewed-by: Craig Harrison <99eef1acdba5798416d3e9b64af8fe24eaab0a42@chromium.org>
Commit-Ready: Kris Rambish <8a1e16570749310c5add42ae1efec654b4ce43a0@chromium.org>

marineam/coreos-dev-util,mgireesh05/dev-util,coreos/dev-util,mgireesh05/dev-util,mgireesh05/dev-util,marineam/coreos-dev-util,coreos/dev-util,coreos/dev-util