Only include the base name of the expectations files in the metadata of the JSON results
Only include the base name of the expectations files in the metadata of the JSON results

Different shards may have different absolute paths for chromium src files.

Bug: chromium:698902
Change-Id: Ibaa4d4f59f0bb254d88b2597e21c1873e499e2a4
Reviewed-on: https://chromium-review.googlesource.com/c/catapult/+/1592693
Reviewed-by: Dirk Pranke <6693ee08b084bb2ffa767f664c99b689395e0e4b@chromium.org>
Commit-Queue: Rakib Hasan <b8c940cea6e1ecbd15dc8d7e22b88b8c22a457f7@google.com>

catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult