simplify and creole => rougail

tests/flattener_dicos/10valid_enum_mandatory/00-base.xml

@@ -1,5 +1,5 @@
 <?xml version='1.0' encoding='UTF-8'?>
-<creole>
+<rougail>
     <services/>
     <variables>
         <family name="general" mode="expert">
@@ -18,6 +18,6 @@
             <param>['a','b','c']</param>
         </check>
     </constraints>
-</creole>
+</rougail>
 <!-- vim: ts=4 sw=4 expandtab
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