Fix pylint issues

Change-Id: I2bf1a1752693f2600e0fe62e30300e04706b6546
diff --git a/tests/tests.py b/tests/tests.py
index e5be7ca..20d9449 100644
--- a/tests/tests.py
+++ b/tests/tests.py
@@ -21,9 +21,10 @@
 
 
 class CinderTestsStorPool(CinderTests):
+    """Subclass to skip broken tests"""
+
     def test_105_volume_create_from_img(self):
         self.skipTest("Skip until Glance is included in setup")
-        pass
 
 
 class CinderStorPoolTest(CinderBackendTest):
@@ -39,4 +40,3 @@
 
     def test_cinder_config(self):
         self.skipTest("Skip failing test")
-        pass