PLT-8011: Make Elasticsearch startup fully async. (#7761)

* PLT-8011: Make Elasticsearch startup fully async.

* Use a.Go

cmd/platform/server.go

@@ -137,9 +137,11 @@ func runServer(configFileLocation string) {
 	}
 
 	if a.Elasticsearch != nil {
+		a.Go(func() {
 			if err := a.Elasticsearch.Start(); err != nil {
 				l4g.Error(err.Error())
 			}
+		})
 	}
 
 	if *utils.Cfg.JobSettings.RunJobs {