-- CRM-13125 handled "in" and "notin" operator within stringParam function

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* CRM-13125: Write phpunit tests for reports shipped by hrreport extension
  http://issues.civicrm.org/jira/browse/CRM-13125
* CRM-13012fix:
  http://issues.civicrm.org/jira/browse/CRM-13012fix
Merge pull request #1496 from ravishnair/CRM-13012fix

-- CRM-13125 handled "in" and "notin" operator within stringParam function