Merge pull request #161 from atlasapi/schedule-udpate-msg

Schedule Udpate Message
fix test NPE by setting channel id
Audit logging of writes to Mongo

Conflicts:
	src/main/java/org/atlasapi/persistence/MongoContentPersistenceModule.java
Merge pull request #162 from atlasapi/persistence-audit

Audit logging of writes to Mongo
Set audit db name in test
Add read hash for topic writes

This will reduce both write load on Mongo and topics being
pushed onto the change queue.

Also added persistence auditing for content groups.
Merge pull request #163 from atlasapi/topic-read-hash

Add read hash for topic writes
Add PersistenceAuditLog as a collaborator for MongoContentTables
Add attributes to location and broadcast
Merge branch 'broadcast-location-attributes' into stage