Organize getDeviceTypes for ComponDevice and Item_Devices: prepare components added by plugins (see #4366)


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@22192 35612d4c-9d10-0410-837c-bf9dd1be60d7
Add document to CommonDevice (see #4366)


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@22193 35612d4c-9d10-0410-837c-bf9dd1be60d7