util: testnode UnitTestRunner.py additional_bt5 fix

Apply fix from commit : b111682f

erp5/util/testnode/UnitTestRunner.py

@@ -140,9 +140,11 @@ class UnitTestRunner():
     if '--xvfb_bin' in supported_paramater_set:
       invocation_list.extend(["--xvfb_bin", xvfb_bin_list[0]])
     # TODO : include testnode correction ( b111682f14890bf )
-    bt5_path_list = config.get("bt5_path")
-    if bt5_path_list not in ('', None,):
-      invocation_list.extend(["--bt5_path", bt5_path_list])
+    if hasattr(node_test_suite,'additional_bt5_repository_id'):
+      additional_bt5_path = os.path.join(
+              node_test_suite.working_directory,
+              node_test_suite.additional_bt5_repository_id)
+      invocation_list.extend(["--bt5_path", additional_bt5_path])
     # From this point, test runner becomes responsible for updating test
     # result. We only do cleanup if the test runner itself is not able
     # to run.