PLT-6080 moving clustering to memberlist (#6499)

* PLT-6080 adding cluster discovery service

* Adding memberlist lib

* Adding memberlist lib

* WIP

* WIP

* WIP

* WIP

* Rolling back config changes

* Fixing make file

* Fixing config for cluster

* WIP

* Fixing system console for clustering

* Fixing default config

* Fixing config

* Fixing system console for clustering

* Tweaking hub setting

* Bumping up time

* merging vendor dir

* Updating vendor dir

* Fixing unit test

* Fixing bad merge

* Remove some testing code

* Moving comment

* PLT-6868 adding db ping retry

* Removing unused loc strings

* Adding defer to cancel

cmd/platform/server.go

@@ -112,6 +112,7 @@ func runServer(configFileLocation string) {
 	}
 
 	if einterfaces.GetClusterInterface() != nil {
+		app.RegisterAllClusterMessageHandlers()
 		einterfaces.GetClusterInterface().StartInterNodeCommunication()
 	}