Make test_that available for running tests.

Add a new flag, --use_test_that=True/False, to crosperf, to allow users to
tell crosperf to use the test_that script rather than the run_remote_tests.sh
script for running their tests.

BUG=None
TEST=Tested with and without the flag, to verify that it does the right thing.

Change-Id: I1a040d23adbf364b4a47320d9fd759a2d46e6689
Reviewed-on: https://gerrit-int.chromium.org/43109
Reviewed-by: Luis Lozano <llozano@chromium.org>
Reviewed-by: Yunlian Jiang <yunlian@google.com>
Commit-Queue: Caroline  Tice <cmtice@google.com>
Tested-by: Caroline  Tice <cmtice@google.com>
6 files changed