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JSON manifests are deprecated.

This also removes an unnecessary test catalog in favor of defining test
service manifests inline.

Bug: 895616
Change-Id: I5bd634654bdef124b61e97bb232eeb29114073a1
Reviewed-on: https://chromium-review.googlesource.com/c/1436875Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Ken Rockot <rockot@google.com>
Cr-Commit-Position: refs/heads/master@{#626111}