CRM-14223 - CiviEvent - don't count test registrations when returning participant counts

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* CRM-14223:
  http://issues.civicrm.org/jira/browse/CRM-14223
Merge pull request #2539 from PalanteJon/CRM-14223

CRM-14223 - CiviEvent - don't count test registrations when returning pa...