Add pep8 check for import order

Set flake8-import-order version to 0.17.1
Full py3 compatible version.
Add all Python3 modules to stdlib list.
Also includes fix to an enum34 dependency bug.

Change-Id: Iacbf2a96585fb6e4f784a2541bfad67bb0c9c0e4

lower-constraints.txt

@@ -3,6 +3,7 @@ coverage==4.0
 docutils==0.11
 fixtures==3.0.0
 flake8==2.5.5
+flake8-import-order==0.17.1
 hacking==3.0.0
 openstackdocstheme==1.20.0
 oslotest==3.2.0 # Apache-2.0

sushycli/base.py

@@ -17,7 +17,6 @@
 import argparse
 import json
 import sys
-
 from urllib.parse import urlsplit
 from urllib.parse import urlunsplit
 

sushycli/base_vmedia.py

@@ -15,7 +15,6 @@
 # under the License.
 
 from sushycli import base
-
 from sushycli import base_manager
 
 

test-requirements.txt

@@ -7,4 +7,5 @@ coverage!=4.4,>=4.0 # Apache-2.0
 oslotest>=3.2.0 # Apache-2.0
 stestr>=2.0.0 # Apache-2.0
 testtools>=2.2.0 # MIT
+flake8-import-order>=0.17.1 # LGPLv3
 

tox.ini

@@ -59,6 +59,9 @@ show-source = True
 ignore = E123, E125
 builtins = _
 exclude = .venv, .git, .tox, dist, doc, *lib/python*, *egg,build
+import-order-style = pep8
+application-import-names = sushycli
+filename = *.py
 
 [testenv:lower-constraints]
 deps =