Uniformize code:

New: Call to hook after generation is also done into odt.
Fix: Missing hook before save.

htdocs/core/modules/commande/doc/doc_generic_order_odt.modules.php

@@ -482,6 +482,8 @@ class doc_generic_order_odt extends ModelePDFCommandes
 					}
 				}
 
+				$reshook=$hookmanager->executeHooks('afterODTCreation',$parameters,$this,$action);    // Note that $action and $object may have been modified by some hooks
+				
 				if (! empty($conf->global->MAIN_UMASK))
 					@chmod($file, octdec($conf->global->MAIN_UMASK));