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

/reviewed-on !998

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