CRM-14897 - fix adminGroup for Cleanup Caches so it appears properly in admin console.

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* CRM-14897:
  https://issues.civicrm.org/jira/browse/CRM-14897
Merge pull request #3550 from davecivicrm/CRM-14897

CRM-14897 - fix adminGroup for Cleanup Caches so it appears properly in ...