CRM-14671: added file require for libraries/cms.php

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* CRM-14671: Joomla 3.3 & CiviCRM 4.4.4 / JRegistry fatal PHP error during cron run
  https://issues.civicrm.org/jira/browse/CRM-14671
Merge pull request #3225 from JSProffitt/jcronfix

CRM-14671: added file require for libraries/cms.php