message: Mention the index when some PostVS data doesn't match ref data in test
diff: @@ -205,7 +205,7 @@ class TestCase:
  raise TestFailureException('PostVS data[{}] doesn\'t contain data {} as expected. Data is: {}'.format(idx, key, list(data.keys())))
  if not util.value_compare(ref[key], data[key]):
  - raise TestFailureException('PostVS data \'{}\': {} is not as expected: {}'.format(key, data[key], ref[key]))
  + raise TestFailureException('PostVS data[{}] \'{}\': {} is not as expected: {}'.format(idx, key, data[key], ref[key]))
  log.success("Mesh data is identical to reference")
  