Fix pep8 and py27 checks for gate

Change-Id: I6d0abb66a4e39aaef762a2b31c2522991078e06c

.testr.conf

@@ -0,0 +1,7 @@
+[DEFAULT]
+test_command=OS_STDOUT_CAPTURE=${OS_STDOUT_CAPTURE:-1} \
+             OS_STDERR_CAPTURE=${OS_STDERR_CAPTURE:-1} \
+             OS_TEST_TIMEOUT=${OS_TEST_TIMEOUT:-60} \
+             ${PYTHON:-python} -m subunit.run discover -t ./ ./tests $LISTOPT $IDOPTION
+test_id_option=--load-list $IDFILE
+test_list_option=--list

cathead/cathead.py

@@ -113,12 +113,14 @@ class Cathead(object):
     def wait(self):
         self._scheduler.wait()
 
+
 def main():
     if len(sys.argv) == 2:
         # sys.path.append(os.path.abspath(sys.argv[1]))
         # conf_module = importlib.import_module(sys.argv[1].split(".py")[0])
         # conf = __import__(sys.argv[1].split(".py")[0])
-        (file, path, desc) = imp.find_module(sys.argv[1].split(".py")[0], ["."])
+        py_file = sys.argv[1].split(".py")[0]
+        (file, path, desc) = imp.find_module(py_file, ["."])
         conf_module = imp.load_module('', file, path, desc)
         Cathead(conf_module.CONF).start()
     else:

tests/test_selfsigndriver.py

@@ -1,6 +1,6 @@
 import re
-import unittest
 import tempfile
+import unittest
 
 from cathead.drivers import selfsign
 from cathead import x509