Project: datamanagement
Issue DM-2118: FY18 Implement Failover for L1 Database
Need to implement and test failover - a failure of the master copy of L1 database, and automatic fail over to a replica. The design of the Alert Production L1 database is covered [here|http://ldm-135.readthedocs.org/en/master/#alert-production-and-up-to-date-catalog].
Story points: 80