GitLab

Merge TestCommon into TestRule since there is no long need for sharing
the implementation with other classes

Bug: 711517
Change-Id: I40f53f07d734112fb85fb2bf8d1efe1ad4752097
Reviewed-on: https://chromium-review.googlesource.com/887747Reviewed-by: Bo <boliu@chromium.org>
Commit-Queue: Yoland Yan <yolandyan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532580}