message: Add TPU test support for python 3
diff: @@ -2099,6 +2099,7 @@ def tf_py_test(
  additional_deps = additional_deps + tf_additional_grpc_deps_py()
  # Python version placeholder
  + kwargs.setdefault("srcs_version", "PY2AND3")
  py_test(
  name = name,
  size = size,
  @@ -2109,7 +2110,6 @@ def tf_py_test(
  kernels = kernels,
  main = main,
  shard_count = shard_count,
  - srcs_version = "PY2AND3",
  tags = tags,
  visibility = [clean_dep("//tensorflow:internal")] +
  additional_visibility,
  