erp5_credential: add compatibility with Notification Message usage in erp5_crm

bt5/erp5_credential/SkinTemplateItem/portal_skins/erp5_credential/NotificationMessage_getSubstitutionMappingDictFromArgument.py

@@ -2,4 +2,9 @@
 bug #1998 ('TextDocument should not required a substitution method')
 is fixed'''
 
-return mapping_dict
+result = kw
+
+if mapping_dict is not None:
+  result.update(mapping_dict)
+
+return result

bt5/erp5_credential/SkinTemplateItem/portal_skins/erp5_credential/NotificationMessage_getSubstitutionMappingDictFromArgument.xml

@@ -50,7 +50,7 @@
         </item>
         <item>
             <key> <string>_params</string> </key>
-            <value> <string>mapping_dict=None</string> </value>
+            <value> <string>mapping_dict=None, **kw</string> </value>
         </item>
         <item>
             <key> <string>id</string> </key>