CRM_Contact_BAO_Individual Code cleanup
CRM-13344 - Individual/Pseudoconstant - Fix prefix/suffix

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* CRM-13344: Resolve test / schema issues around prefix_id, suffix_id, gender
  http://issues.civicrm.org/jira/browse/CRM-13344
Merge pull request #1763 from colemanw/prefix-suffix

CRM-13344 - Individual/Pseudoconstant - Fix prefix/suffix