Merge pull request #23 from m-a-hall/pdi4compatible

[PDI-10022] Some valid aggregate data queries return error with get fields.
[PDI-9986] MongoDb output should handle the "downtime" that may occur when the primary node goes down and the replica set is electing a new one.
Merge pull request #25 from m-a-hall/pdi4compatible-insertRetries

[PDI-9986] MongoDb output should handle the "downtime" that may occur when the primary node goes down and the replica set is electing a new one.
[PDI-10101] Missing labels for Write Retries and Retry Delay.