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increase replication factor for system_auth keyspace on maps / cassandra
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Description

Current replication factor for the system_auth keyspace is 1, which means that loosing a single cassandra node potentially breaks the authentication. Replication factor should be increased to the cluster size.

Event Timeline

Change 317776 had a related patch set uploaded (by Gehel):
maps/cassandra - ensure that system_auth keyspace is replicated

https://gerrit.wikimedia.org/r/317776

Change 317776 merged by Gehel:
maps/cassandra - ensure that system_auth keyspace is replicated

https://gerrit.wikimedia.org/r/317776

system_auth keyspace is updated with a replication factor of 4 for the maps1*, maps2* and maps-test2* clusters. Initial cassandra configuration script is also updated to ensure this configuration will be applied to new maps clusters.