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

model/config.go

@@ -163,9 +163,14 @@ type ServiceSettings struct {
 }
 
 type ClusterSettings struct {
-	Enable                 *bool
-	InterNodeListenAddress *string
-	InterNodeUrls          []string
+	Enable                *bool
+	ClusterName           *string
+	OverrideHostname      *string
+	UseIpAddress          *bool
+	UseExperimentalGossip *bool
+	ReadOnlyConfig        *bool
+	GossipPort            *int
+	StreamingPort         *int
 }
 
 type MetricsSettings struct {
@@ -1036,18 +1041,44 @@ func (o *Config) SetDefaults() {
 		*o.ServiceSettings.PostEditTimeLimit = 300
 	}
 
-	if o.ClusterSettings.InterNodeListenAddress == nil {
-		o.ClusterSettings.InterNodeListenAddress = new(string)
-		*o.ClusterSettings.InterNodeListenAddress = ":8075"
-	}
-
 	if o.ClusterSettings.Enable == nil {
 		o.ClusterSettings.Enable = new(bool)
 		*o.ClusterSettings.Enable = false
 	}
 
-	if o.ClusterSettings.InterNodeUrls == nil {
-		o.ClusterSettings.InterNodeUrls = []string{}
+	if o.ClusterSettings.ClusterName == nil {
+		o.ClusterSettings.ClusterName = new(string)
+		*o.ClusterSettings.ClusterName = ""
+	}
+
+	if o.ClusterSettings.OverrideHostname == nil {
+		o.ClusterSettings.OverrideHostname = new(string)
+		*o.ClusterSettings.OverrideHostname = ""
+	}
+
+	if o.ClusterSettings.UseIpAddress == nil {
+		o.ClusterSettings.UseIpAddress = new(bool)
+		*o.ClusterSettings.UseIpAddress = true
+	}
+
+	if o.ClusterSettings.UseExperimentalGossip == nil {
+		o.ClusterSettings.UseExperimentalGossip = new(bool)
+		*o.ClusterSettings.UseExperimentalGossip = false
+	}
+
+	if o.ClusterSettings.ReadOnlyConfig == nil {
+		o.ClusterSettings.ReadOnlyConfig = new(bool)
+		*o.ClusterSettings.ReadOnlyConfig = true
+	}
+
+	if o.ClusterSettings.GossipPort == nil {
+		o.ClusterSettings.GossipPort = new(int)
+		*o.ClusterSettings.GossipPort = 8074
+	}
+
+	if o.ClusterSettings.StreamingPort == nil {
+		o.ClusterSettings.StreamingPort = new(int)
+		*o.ClusterSettings.StreamingPort = 8075
 	}
 
 	if o.MetricsSettings.ListenAddress == nil {