Goal: 

• Snapshot RH repos

Acceptance Criteria:

• Update repositories api to return RH repos if origin includes RedHat or is not specified
  • Red hat repos would have a repo config created in a special org (-1)
  • Users would not be able to edit, delete, introspect, or snapshot Red Hat Repos
  • Users would be able to fetch, list rpms of, list snapshots of, and rpm name search red hat repos.
• Add ability to filter the repositories api by 'type' (should just be yum for now, this can be a dumb filter that doesn't really do much right now)
• Ensure a user can't snapshot a custom Red Hat repository as a custom repo (snapshotting should fail because it requires a client cert)
• Update 'load-external-repos' to load a json file similar to the current external_repos.json
• Update the nightly cron job to snapshot RH repos (if its already snapshotting)
  • Just snapshot the same cdn.redhat.com ones as are in external repos for now
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