Localhost exception fixes for rake task helper
Helper methods to support the narrowed localhost exception
Localhost exception fixes for functional tests
Localhost exception fixes for threading tests
Add authentication necessary for replication tests
Rename add_admin_user to ensure_admin_user everywhere
Localhost exception fixes for replica_set tests
Replace hard-wired 13 with constant AUTH_ERROR
Update sharding tests to handle narrowed localhost exception
Restructure ensure_auth method so it does not affect pre-2.7.1 servers