CRM-14129 - Core reports - passing mhas as a URL criteria is ignored

http://issues.civicrm.org/jira/browse/CRM-14129
Merge pull request #2438 from deepak-srivastava/CRM-14129

CRM-14129 - Core reports - passing mhas as a URL criteria is ignored
Merge branch '4.4' into CRM-14128
CRM-14128 - change to mhas

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* CRM-14128: Participant Count Report offers 'is not role' criteria - but treats it the same as 'is role'
  http://issues.civicrm.org/jira/browse/CRM-14128