Return when first test suite class is found instead of iterating over

all repository list which will cause a mismatch between test suite class
location and repository.

/reviewed-on !945

erp5/util/testnode/ScalabilityTestRunner.py

@@ -454,7 +454,9 @@ Require valid-user
         module = imp.load_source(SCALABILITY_TEST, "%s/%s/%s" %(location, SCALABILITY_TEST, TEST_SUITE_INIT))
         suite_class = getattr(module, test_suite)
         suite = suite_class(**kwargs)
-        repo_location = "%s/%s/" % (location, SCALABILITY_TEST)
+        if suite is not None:
+          repo_location = "%s/%s/" % (location, SCALABILITY_TEST)
+          return suite, repo_location
       except Exception:
         pass
     return suite, repo_location