Add optional config parameter to test elasticsearch endpoint. (#6877)

api4/elasticsearch.go

@@ -19,12 +19,17 @@ func InitElasticsearch() {
 }
 
 func testElasticsearch(c *Context, w http.ResponseWriter, r *http.Request) {
+	cfg := model.ConfigFromJson(r.Body)
+	if cfg == nil {
+		cfg = utils.Cfg
+	}
+
 	if !app.SessionHasPermissionTo(c.Session, model.PERMISSION_MANAGE_SYSTEM) {
 		c.SetPermissionError(model.PERMISSION_MANAGE_SYSTEM)
 		return
 	}
 
-	if err := app.TestElasticsearch(); err != nil {
+	if err := app.TestElasticsearch(cfg); err != nil {
 		c.Err = err
 		return
 	}