fix test and itignore for virtualenvs

.gitignore

@@ -21,3 +21,4 @@
 /share/
 /src/plone.api.egg-info/
 /var/
+pip-selfcheck.json

buildout.cfg

@@ -3,7 +3,7 @@ extends =
     https://raw.github.com/collective/buildout.plonetest/master/test-4.3.x.cfg
     plone-4.3.x.cfg
 package-name = plone.api
-package-extras = [test]
+package-extras = [develop, test]
 test-eggs = Pillow
 parts +=
     omelette

src/plone/api/tests/test_env.py

@@ -406,7 +406,7 @@ def test_read_only_mode(self):
         """Test that read_only_mode() returns False
         as we have a write enabled ZODB."""
         from plone.api.env import read_only_mode
-        self.assertEqual(read_only_mode(), False)
+        self.assertFalse(read_only_mode())
 
     def test_plone_version(self):
         """Tests that plone_version() returns Plone version."""