Enabled hacking checks H305 and H307

* H305  imports not grouped correctly
* H307  like imports should be grouped together

Change-Id: Ia4b376a90fed830ceea4b91caa920ff38263df5e

git_review/cmd.py

@@ -18,16 +18,17 @@ implied.
 See the License for the specific language governing permissions and
 limitations under the License."""
 
+import argparse
 import datetime
 import json
 import os
-import pkg_resources
 import re
 import shlex
 import subprocess
 import sys
 import textwrap
 
+import pkg_resources
 import requests
 
 if sys.version < '3':
@@ -40,6 +41,7 @@ if sys.version < '3':
     do_input = raw_input
 else:
     import configparser as ConfigParser
+
     import urllib.parse
     import urllib.request
     urlencode = urllib.parse.urlencode
@@ -1036,8 +1038,6 @@ def convert_bool(one_or_zero):
 def main():
     usage = "git review [OPTIONS] ... [BRANCH]"
 
-    import argparse
-
     class DownloadFlag(argparse.Action):
         """Additional option parsing: store value in 'dest', but
            at the same time set one of the flag options to True

tox.ini

@@ -23,6 +23,6 @@ commands = python setup.py sdist {posargs}
 commands = {posargs}
 
 [flake8]
-ignore = E125,H202,H305,H307,H405,H904
+ignore = E125,H202,H405,H904
 show-source = True
 exclude = .venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build