Add support for AWS RDS MySQL Multi-AZ Cluster auto-discovery #4490
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…instead of originating server's values, add new field in mmsd for reader hostgroup, and query monitor db instead of admin db
…putation after adding a new server, and other small changes based on feedback
Add support for AWS RDS MySQL Multi-AZ Cluster auto-discovery
Right now we lock on Admin everytime we are adding discovered servers. This prevents concurrent configuration modifications, and also ensures consistency during configuration promotions. In the future this locking *may become* not necessary.
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This is a followup on PR #4406 with some minor required changes.