MT#64172 admin_jwt restore use_session = 1

* sessions are used for admin_jwt realm because admin-ui
  iframed content relies on it as well as this realm is
  not related to API

Change-Id: I6c0ee99301757c1479ce8148240b9583da144ea3
(cherry picked from commit acf142a993)

lib/NGCP/Panel.pm

@@ -179,7 +179,7 @@ __PACKAGE__->config(
                 user_model => 'DB::admins',
                 store_user_class => 'NGCP::Panel::Authentication::Store::RoleFromRealm',
             },
-            use_session => 0,
+            use_session => 1,
         },
         api_admin => {
             credential => {