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

config/config.json

@@ -263,8 +263,13 @@
     },
     "ClusterSettings": {
         "Enable": false,
-        "InterNodeListenAddress": ":8075",
-        "InterNodeUrls": []
+        "ClusterName": "",
+        "OverrideHostname": "",
+        "UseIpAddress": true,
+        "UseExperimentalGossip": false,
+        "ReadOnlyConfig": true,
+        "GossipPort": 8074,
+        "StreamingPort": 8075
     },
     "MetricsSettings": {
         "Enable": false,