Add license and imports (#6026)

official/resnet/estimator_cifar_benchmark.py

+# Copyright 2017 The TensorFlow Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ==============================================================================
 """Executes Estimator benchmarks and accuracy tests."""
+
+from __future__ import absolute_import
+from __future__ import division
 from __future__ import print_function
 
 import os

official/resnet/keras/keras_cifar_benchmark.py

@@ -13,6 +13,9 @@
 # limitations under the License.
 # ==============================================================================
 """Executes Keras benchmarks and accuracy tests."""
+
+from __future__ import absolute_import
+from __future__ import division
 from __future__ import print_function
 
 import os