html fix-up - replace <-> with &gt;->&lt;
 CRM-14017 - html validation issues on relationship type admin page

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* CRM-14017: html validation issues on relationship type admin page
  http://issues.civicrm.org/jira/browse/CRM-14017
Merge pull request #2241 from eileenmcnaughton/invalid-html

html fix-up - replace <-> with &gt;->&lt;