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This makes three updates to the XML config:

1. All events must now have an associated project.

2. All projects now have an ID field.

3. Events no longer need owners fields, only the project itself.

Bug: 1148168
Change-Id: I128d365819f9d54a92b3293b21b9b78a16af059c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2550150
Commit-Queue: Tony Yeoman <tby@chromium.org>
Reviewed-by: Rachel Wong <wrong@chromium.org>
Cr-Commit-Position: refs/heads/master@{#830079}