This test is having flaky timeouts on the bots. Disable it for now.

BUG=angleproject:1107

Change-Id: Iaa15672fb96f4aa3463a0613980f8a941aeafe1f
Reviewed-on: https://chromium-review.googlesource.com/288405Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>