Following the deletion of the foundation-board-repos.yaml file,
the script failed as it was expecting it.
Remove that file from the scanned list, and make the script more
resilient in case other extra files go missing in the future (like
user-committee.yaml which should soon be cleaned up).
Change-Id: I83cff14f19a829b5e56771442ffb3a0341e82d69
0f12fa2d5a