erp5_test_result: follow naming conventions for skin folder ids

bt5/erp5_test_result/SkinTemplateItem/portal_skins/erp5_test_results.xml → bt5/erp5_test_result/SkinTemplateItem/portal_skins/erp5_test_result.xml

@@ -14,7 +14,7 @@
         </item>
         <item>
             <key> <string>id</string> </key>
-            <value> <string>erp5_test_results</string> </value>
+            <value> <string>erp5_test_result</string> </value>
         </item>
         <item>
             <key> <string>title</string> </key>