HDDS-8835. ReplicationManager: Fix metrics to work with new RM

[sodonnel]

What changes were proposed in this pull request?

This change is to tidy up the metrics in ReplicationManager metrics. Some of the legacy metrics are no longer valid in the new RM, and the naming was inconsistent between the old Ratis metrics and EC metrics.

The new metrics after this change look like the following:

"name" : "Hadoop:service=StorageContainerManager,name=ReplicationManagerMetrics",
    "modelerType" : "ReplicationManagerMetrics",
    "tag.Hostname" : "835ec174c7ef",
    "InflightReplication" : 0,
    "InflightDeletion" : 0,
    "InflightEcReplication" : 0,
    "InflightEcDeletion" : 2,
    "UnderReplicatedQueueSize" : 0,
    "OverReplicatedQueueSize" : 0,
    "OpenContainers" : 0,
    "ClosingContainers" : 0,
    "QuasiClosedContainers" : 0,
    "ClosedContainers" : 14,
    "DeletingContainers" : 1,
    "DeletedContainers" : 0,
    "RecoveringContainers" : 0,
    "UnderReplicatedContainers" : 0,
    "MisReplicatedContainers" : 0,
    "OverReplicatedContainers" : 0,
    "MissingContainers" : 0,
    "UnhealthyContainers" : 0,
    "EmptyContainers" : 0,
    "OpenUnhealthyContainers" : 0,
    "StuckQuasiClosedContainers" : 0,
    "ReplicationCmdsSentTotal" : 0,
    "ReplicasCreatedTotal" : 0,
    "ReplicaCreateTimeoutTotal" : 0,
    "DeletionCmdsSentTotal" : 0,
    "ReplicasDeletedTotal" : 0,
    "ReplicaDeleteTimeoutTotal" : 0,
    "EcReplicationCmdsSentTotal" : 0,
    "EcDeletionCmdsSentTotal" : 62,
    "EcReplicasCreatedTotal" : 5,
    "EcReplicasDeletedTotal" : 0,
    "EcReconstructionCmdsSentTotal" : 15,
    "EcReplicaCreateTimeoutTotal" : 10,
    "EcReplicasDeletedTotal" : 0,
    "EcReplicaDeleteTimeoutTotal" : 60,
    "EcReconstructionCmdsDeferredTotal" : 0,
    "DeleteContainerCmdsDeferredTotal" : 0,
    "ReplicateContainerCmdsDeferredTotal" : 0

There are some quite large changes as a result of renaming some getting and setter methods after changing the metric names, but the change is split into separate commits to make it easier to review.

What is the link to the Apache JIRA

https://issues.apache.org/jira/browse/HDDS-8835

How was this patch tested?

Some tests were modified, but this was mostly validated manually to produce the results above, by create containers and stopping and starting some nodes.

[adoroszlai]

Thanks @sodonnel for the patch.