Fix pep8 errors

"tox -e pep8" is showing these new errors

./openstack_releases/gitutils.py:52:9: W503 line break before binary operator
./openstack_releases/governance.py:77:21: W503 line break before binary operator
./openstack_releases/cmds/list_changes.py:152:21: W503 line break before binary operator
./openstack_releases/cmds/validate.py:36:1: E402 module level import not at top of file
./openstack_releases/cmds/validate.py:37:1: E402 module level import not at top of file
./openstack_releases/cmds/validate.py:38:1: E402 module level import not at top of file

Change-Id: I4c460928af038fc93ca1057953408f8cc7cac24e

openstack_releases/cmds/list_changes.py

@@ -148,9 +148,7 @@ def main():
                     start_range = previous_project['hash']
             if not start_range:
                 start_range = (
-                    gitutils.get_latest_tag(workdir, project['repo'])
+                    gitutils.get_latest_tag(workdir, project['repo']) or None
-                    or
-                    None
                 )
 
             if start_range:

openstack_releases/cmds/validate.py

@@ -31,12 +31,13 @@ import yaml
 
 # Disable warnings about insecure connections.
 from requests.packages import urllib3
-urllib3.disable_warnings()
 
 from openstack_releases import defaults
 from openstack_releases import gitutils
 from openstack_releases import versionutils
 
+urllib3.disable_warnings()
+
 
 def is_a_hash(val):
     "Return bool indicating if val looks like a valid hash."

openstack_releases/gitutils.py

@@ -48,8 +48,7 @@ def commit_exists(repo, ref):
     url = CGIT_TEMPLATE % (repo, ref)
     response = requests.get(url)
     missing_commit = (
-        (response.status_code // 100 != 2)
+        (response.status_code // 100 != 2) or 'Bad object id' in response.text
-        or 'Bad object id' in response.text
     )
     return not missing_commit
 

openstack_releases/governance.py

@@ -73,5 +73,5 @@ class Repository(object):
 
     @property
     def code_related(self):
-        return not (self.name.endswith('-specs')
+        return (not (self.name.endswith('-specs') or
-                    or 'cookiecutter' in self.name)
+                     'cookiecutter' in self.name))