Disable flaky DriveIntegrationServiceTest.ServiceInstanceIdentity

It is flaky on chromeos. See the bug for detail.

TBR=hashimoto@chromium.org

Bug: 943376
Change-Id: I6b39c06c077d66d6299deab79221d1fb52eb6344
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1529496
Reviewed-by: Yoichi Osato <yoichio@chromium.org>
Commit-Queue: Yoichi Osato <yoichio@chromium.org>
Auto-Submit: Yoichi Osato <yoichio@chromium.org>
Cr-Commit-Position: refs/heads/master@{#641820}
1 file changed