Add init and comply with flake8

Author: saimidu

docker/__init__.py

@@ -14,11 +14,10 @@
 
 import unittest
 
+from docker.build_artifacts import deep_learning_container as deep_learning_container_to_test
 import pytest
 import requests
 
-from docker.build_artifacts import deep_learning_container as deep_learning_container_to_test
-
 
 @pytest.fixture(name='fixture_valid_instance_id')
 def fixture_valid_instance_id(requests_mock):