Use nitro production in Atlas stage
Full support for blackout_restriction

Until now, blackout_restriction has been dummy data on
the Atlas API. With these changes, blackout restrictions
are properly supported in both GET and POST requests.
Use nitro production in Atlas stage
ContentMerger now merges topics!

- ContentMerger now requires a TopicMergeStrategy

- Available strategies include:
  - Throw away new topics
  - Throw away old topics
  - Replace topics based on a given equivalence
KM ingest can just replace old topic refs
KM ingest no longer needs to resolve topics

This was originally needed for a check I added to fix an earlier data mistake.
Getty ingest now uses ContentMerger's topic merging
Things have to give ContentMerger a TopicsMergeStrategy
Add Box Office Picks content group
Merge pull request #581 from atlasapi/bt-box-office-picks

BT Box Office Picks ingest
Remove insistance that group has 'all' in path
Remove unnecessary prefix in URI
Merge pull request #579 from atlasapi/mbst-9928-blackout-flag

Full support for blackout_restriction
Merge branch 'content-topics-merger'
Remove dummy data for blackout flag
Remove marketing strings from titles
Allow URIs to be excluded from consideration in equiv
Merge pull request #583 from atlasapi/exclude-uris-from-equiv

Allow URIs to be excluded from consideration in equiv
Fix test
Remove marketing titles suffixes