test_result: add Reference property sheet on Test Suite Repository

This property sheet was missing, but test passed because both the
setSourceReference and getSourceReference were acquired. Change also the
test to use edit(source_reference=) which is what happens when editing
in the UI.

bt5/erp5_test_result/PortalTypePropertySheetTemplateItem/property_sheet_list.xml

@@ -64,6 +64,7 @@
  </portal_type>
  <portal_type id="Test Suite Repository">
   <item>Arrow</item>
+  <item>Reference</item>
   <item>TestSuiteRepository</item>
   <item>TestSuiteRepositoryConstraint</item>
  </portal_type>

bt5/erp5_test_result/TestTemplateItem/portal_components/test.erp5.testTaskDistribution.py

@@ -1644,8 +1644,8 @@ class TestGitlabRESTConnectorInterface(ERP5TypeTestCase):
       self.tic()
 
   def test_status_per_test_result_line(self):
-    self.test_suite.test_repo.setSourceReference(
-        'test_result_line')
+    self.test_suite.test_repo.edit(
+        source_reference='test_result_line')
     self.test_result.newContent(
         portal_type='Test Result Line',
         title='this test_result_line is OK',
@@ -1672,8 +1672,8 @@ class TestGitlabRESTConnectorInterface(ERP5TypeTestCase):
       self.tic()
 
   def test_status_per_test_result_line_multiple_matches(self):
-    self.test_suite.test_repo.setSourceReference(
-        'test_result_line')
+    self.test_suite.test_repo.edit(
+        source_reference='test_result_line')
     self.test_result.newContent(
         portal_type='Test Result Line',
         title='this test_result_line is OK',

bt5/erp5_test_result/bt/template_portal_type_property_sheet_list

@@ -27,6 +27,7 @@ Test Result | Comment
 Test Result | SortIndex
 Test Result | Task
 Test Suite Repository | Arrow
+Test Suite Repository | Reference
 Test Suite Repository | TestSuiteRepository
 Test Suite Repository | TestSuiteRepositoryConstraint
 Test Suite | Arrow