Mark stages as skipped if WaitUntilReady returns False.

Mark stages as skipped instead of failed in results_lib.Results
and CIDB when WaitUntilReady returns False.

BUG=chromium:615464
TEST=run_tests

Change-Id: I7a7c46ced58cb14e0477444379cc67f931ac8c29
Reviewed-on: https://chromium-review.googlesource.com/347519
Commit-Ready: Ningning Xia <nxia@chromium.org>
Tested-by: Ningning Xia <nxia@chromium.org>
Reviewed-by: Don Garrett <dgarrett@chromium.org>
2 files changed