/**
  * Update the mirrors, using the scheduler task of EXT:em.
  *
  * @throws RuntimeException
  * @return boolean
  */
 public function updateMirrors()
 {
     $result = FALSE;
     $repositories = $this->repositoryRepository->findAll();
     // update all repositories
     foreach ($repositories as $repository) {
         $this->repositoryHelper->setRepository($repository);
         $result = $this->repositoryHelper->updateExtList();
         unset($objRepository, $this->repositoryHelper);
     }
     return $result;
 }