Add CHANNEL_GROUPS_SUMMARY annotation

This annotation outputs the ids and aliases of channel
groups a channel is part of.
Merge pull request #499 from atlasapi/mbst-8719-improve-cors-filter

Mbst 8719 improve cors filter
Merge pull request #502 from atlasapi/channel-summary

Add CHANNEL_GROUPS_SUMMARY annotation
Merge pull request #503 from atlasapi/broadcast-location-attributes

Broadcast location attributes
Add dummy output for five on-demand
Prefix for 5 was wrong for dummy data
Temporarily allow null serviceResolvers

This will change next week when we flesh out the new
data structures.
Update locations for clips and category URIs
Expect lookups of brand/series summaries
Message sender requires channel ID
Clips' URI changed
Add support for FeatureSets
Add config to support featuresets for Ireland and Soap-Entertainment
Merge branch 'mbst-8912-featureset-support' into stage