Merge pull request #3769 from shin-/upgrade-dockerpy-1.9.0

Update to docker-py 1.9.0

requirements.txt

@@ -1,7 +1,7 @@
 PyYAML==3.11
 backports.ssl-match-hostname==3.5.0.1; python_version < '3'
 cached-property==1.2.0
-docker-py==1.9.0rc2
+docker-py==1.9.0
 dockerpty==0.4.1
 docopt==0.6.1
 enum34==1.0.4; python_version < '3.4'

setup.py

@@ -34,7 +34,7 @@ install_requires = [
     'requests >= 2.6.1, < 2.8',
     'texttable >= 0.8.1, < 0.9',
     'websocket-client >= 0.32.0, < 1.0',
-    'docker-py == 1.9.0rc2',
+    'docker-py >= 1.9.0, < 2.0',
     'dockerpty >= 0.4.1, < 0.5',
     'six >= 1.3.0, < 2',
     'jsonschema >= 2.5.1, < 3',