[MM-16768] Add support for Elasticsearch v7 (#12537)

* [MM-16768] Add support for Elasticsearch v7

* Fix i18n

* Adds external services tracking to the telemetry

* Rebuild elasticsearch interface mock

* Rename diagnostics keys

* Fix merge change

app/diagnostics.go

@@ -52,6 +52,7 @@ const (
 	TRACK_PERMISSIONS_GENERAL       = "permissions_general"
 	TRACK_PERMISSIONS_SYSTEM_SCHEME = "permissions_system_scheme"
 	TRACK_PERMISSIONS_TEAM_SCHEMES  = "permissions_team_schemes"
+	TRACK_ELASTICSEARCH             = "elasticsearch"
 
 	TRACK_ACTIVITY = "activity"
 	TRACK_LICENSE  = "license"
@@ -72,6 +73,7 @@ func (a *App) sendDailyDiagnostics(override bool) {
 		a.trackPlugins()
 		a.trackServer()
 		a.trackPermissions()
+		a.trackElasticsearch()
 	}
 }
 
@@ -861,3 +863,13 @@ func (a *App) trackPermissions() {
 		}
 	}
 }
+
+func (a *App) trackElasticsearch() {
+	data := map[string]interface{}{}
+
+	if a.Elasticsearch != nil && a.Elasticsearch.GetVersion() != 0 {
+		data["elasticsearch_server_version"] = a.Elasticsearch.GetVersion()
+	}
+
+	a.SendDiagnostic(TRACK_ELASTICSEARCH, data)
+}