[autotest] Add a --web option for run_suite.

This enables run_suite to fire suite requests against
a webserver running on a vm on localhost. The shadow_config
setting is inadequate because a. one could still have a
localhost apache webserver running and b. we need the ability
to fire requests at multiple vms with webservers on different
ports.

TEST=Ran run_suite.
BUG=chromium:423225,chromium:425347

Change-Id: Id58062d1f45f4912c854f39fd5b93c954f3024e8
Reviewed-on: https://chromium-review.googlesource.com/227451
Tested-by: Prashanth B <beeps@chromium.org>
Reviewed-by: Fang Deng <fdeng@chromium.org>
Commit-Queue: Prashanth B <beeps@chromium.org>
1 file changed