minor improvment


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@20745 35612d4c-9d10-0410-837c-bf9dd1be60d7
getNameField /getCompleteNameField to static


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@20747 35612d4c-9d10-0410-837c-bf9dd1be60d7
apply 20741 + 20742, Toolbox::writeConfig()

git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@20750 35612d4c-9d10-0410-837c-bf9dd1be60d7