Fix pep8 violations in tests

Some minor updates to the testing file so that it would pass a pep8
checker.  Also adds a pep8 tox target to test them :)

Change-Id: I5c704a1b5a1b5f8b6d80a8f538b56befbe656099

test-requirements.txt

@@ -0,0 +1,5 @@
+# The order of packages is significant, because pip processes them in the order
+# of appearance. Changing the order has an impact on the overall integration
+# process, which may cause wedges in the gate later.
+
+hacking>=0.10.0,<0.11

tests/test_titles.py

@@ -75,7 +75,7 @@ class TestTitles(testtools.TestCase):
             self.assertTrue(
                 len(line) < 80,
                 msg="%s:%d: Line limited to a maximum of 79 characters." %
-                (tpl, i+1))
+                (tpl, i + 1))
 
     def _check_no_cr(self, tpl, raw):
         matches = re.findall('\r', raw)
@@ -84,13 +84,11 @@ class TestTitles(testtools.TestCase):
             "Found %s literal carriage returns in file %s" %
             (len(matches), tpl))
 
-
     def _check_trailing_spaces(self, tpl, raw):
         for i, line in enumerate(raw.split("\n")):
             trailing_spaces = re.findall(" +$", line)
-            self.assertEqual(len(trailing_spaces),0,
-                    "Found trailing spaces on line %s of %s" % (i+1, tpl))
-
+            self.assertEqual(len(trailing_spaces), 0,
+                    "Found trailing spaces on line %s of %s" % (i + 1, tpl))
 
     def test_template(self):
         releases = [x.split('/')[1] for x in glob.glob('specs/*/')]

tox.ini

@@ -2,7 +2,7 @@
 # Hold back to 1.4, since that's what's in Fedora 20 repos
 # and we don't need anything newer for nova-specs tests
 minversion = 1.4
-envlist = docs,py27
+envlist = docs,py27,pep8
 skipsdist = True
 
 [testenv]
@@ -22,3 +22,12 @@ commands = {posargs}
 commands =
   find . -type f -name "*.pyc" -delete
   python setup.py build_sphinx
+
+[testenv:pep8]
+deps = -r{toxinidir}/test-requirements.txt
+commands =
+  flake8 {posargs}
+
+[flake8]
+ignore = E128
+exclude = .venv,.git,.tox,doc,.eggs