Enabling alternate key support for FAFTSetup test.

BUG=chrome-os-partner:13970
TEST=FAFTSetup passes on Stout and Parrot

Change-Id: Ic66daf017de0204d95b4761988132afbadf6d413
Reviewed-on: https://gerrit.chromium.org/gerrit/38463
Reviewed-by: Tom Wai-Hong Tam <waihong@chromium.org>
Reviewed-by: Todd Broch <tbroch@chromium.org>
Commit-Ready: Gediminas Ramanauskas <gedis@chromium.org>
Tested-by: Gediminas Ramanauskas <gedis@chromium.org>
2 files changed