FixClusterSplit use to detect and fix Cluster split.

FixFailedNodes fix failed nodes: in some cases (cluster without enough master after crash or scale down), some nodes may still know about fail nodes.

FixGhostMasterNodes used to removed gost redis nodes.

FixNodesNotMeet Use to fix Redis nodes that didn't them.

FixTerminatingPods used to for the deletion of pod blocked in terminating status.

FixUntrustedNodes used to remove Nodes that are not trusted by other nodes.

RunSanityChecks function used to run all the sanity check on the current cluster Return actionDone = true if a modification has been made on the cluster.