Fix Job Viewer deep link regression (introduced in ubccr#733).

The Update Job Viewer API ubccr#733 pull request introduced check to confirm
that the jobref is an int. This check was too restrictive since the
jobref will be a numeric string when loading from a url.

classes/Rest/Controllers/WarehouseControllerProvider.php

@@ -2000,7 +2000,7 @@ private function getJobByPrimaryKey(Application $app, \XDUser $user, $realm, $se
             throw new \DataWarehouse\Query\Exceptions\AccessDeniedException;
         }
 
-        if (isset($searchparams['jobref']) && is_int($searchparams['jobref'])) {
+        if (isset($searchparams['jobref']) && is_numeric($searchparams['jobref'])) {
             $params = array(
                 'primary_key' => $searchparams['jobref']
             );