[0.83] child entity for contract template - see #4620

git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.83-bugfixes@22111 35612d4c-9d10-0410-837c-bf9dd1be60d7
[0.83] CS previous

git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.83-bugfixes@22112 35612d4c-9d10-0410-837c-bf9dd1be60d7