Additional QA Fix for CRM-15427

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* CRM-15427: Profiles using Participants (Event type), Participants (Event Name) and Participants (Role) custom fields are not available for online registration
  https://issues.civicrm.org/jira/browse/CRM-15427
Merge pull request #4525 from atif-shaikh/CRM-15427QAFix

Additional QA Fix for CRM-15427