1) Fixes the incorrect title shown for the error message in restore/backup.

2) Doc updates for webserver authentication.
3) Cleanup task for API tests.

web/pgadmin/tools/backup/static/js/backup.js

@@ -177,7 +177,7 @@ define([
     saveCallBack: function(data, dialog) {
       if(data.errormsg) {
         Notify.alert(
-          gettext('Utility not found'),
+          gettext('Error'),
           gettext(data.errormsg)
         );
       } else {