[0.83] fix strtr for php 5.3

git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.83-bugfixes@21450 35612d4c-9d10-0410-837c-bf9dd1be60d7
[0.83] fix notification template for numeric tag - see #4415

git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.83-bugfixes@21453 35612d4c-9d10-0410-837c-bf9dd1be60d7