CRM-13344 - Contact Import - Fix prefix, suffix, gender import

----------------------------------------
* CRM-13344: Resolve test / schema issues around prefix_id, suffix_id, gender
  http://issues.civicrm.org/jira/browse/CRM-13344
Merge pull request #1742 from colemanw/4.4

CRM-13344 - Contact Import - Fix prefix, suffix, gender import