Adding APIs to reload config, recycle db connections and ping server (#3096)

* Adding APIs to reload config, recycle db connections and ping server

* Fixing unit test

* Adding unit tests

webapp/root.jsx

@@ -112,7 +112,7 @@ function preRenderSetup(callwhendone) {
         l.message = 'msg: ' + msg + ' row: ' + line + ' col: ' + column + ' stack: ' + stack + ' url: ' + url;
 
         $.ajax({
-            url: '/api/v3/admin/log_client',
+            url: '/api/v3/general/log_client',
             dataType: 'json',
             contentType: 'application/json',
             type: 'POST',