test_that: Be able to specify pool.

BUG=chromium:446321
TEST='--pool' is passed to test_that_wrapper

Change-Id: I591ca76419aa6cf796dfa986816f542ba5000963
Reviewed-on: https://chromium-review.googlesource.com/246185
Reviewed-by: Aviv Keshet <akeshet@chromium.org>
Tested-by: Simran Basi <sbasi@chromium.org>
Commit-Queue: Simran Basi <sbasi@chromium.org>
1 file changed