CRM-14913 fix - merging contacts does not change contact_id in financial_item table.

https://issues.civicrm.org/jira/browse/CRM-14913
Merge pull request #3604 from monishdeb/CRM-14913

CRM-14913 fix - merging contacts does not change contact_id in financial...
Merge branch '4.4' of git://github.com/civicrm/civicrm-core into CRM-14505