slapos_erp5: Update testSlapOSERP5DefaultScenario

Still WIP

master/bt5/slapos_erp5/TestTemplateItem/portal_components/test.erp5.testSlapOSERP5DefaultScenario.xml

@@ -46,8 +46,7 @@
             <key> <string>text_content_warning_message</string> </key>
             <value>
               <tuple>
-                <string>W: 24,  4: Unused variable \'credential_request_form\' (unused-variable)</string>
-                <string>W:867,  4: Unused variable \'credential_request_form\' (unused-variable)</string>
+                <string>W: 15,  0: Unused import json (unused-import)</string>
               </tuple>
             </value>
         </item>