Clean up old style class definitions

common/djangoapps/microsite_configuration/middleware.py

@@ -38,7 +38,7 @@ class MicrositeMiddleware(object):
         return response
 
 
-class MicrositeSessionCookieDomainMiddleware():
+class MicrositeSessionCookieDomainMiddleware(object):
     """
     Special case middleware which should be at the very end of the MIDDLEWARE list (so that it runs first
     on the process_response chain). This middleware will define a wrapper function for the set_cookie() function

common/test/acceptance/pages/studio/overview.py

@@ -404,7 +404,7 @@ class CourseOutlineSection(CourseOutlineContainer, CourseOutlineChild):
         self.add_child()
 
 
-class ExpandCollapseLinkState:
+class ExpandCollapseLinkState(object):
     """
     Represents the three states that the expand/collapse link can be in
     """

common/test/acceptance/tests/studio/test_studio_outline.py

@@ -141,13 +141,16 @@ class WarningMessagesTest(CourseOutlineTest):
     FUTURE_UNPUBLISHED_WARNING = 'Unpublished changes to content that will release in the future'
     NEVER_PUBLISHED_WARNING = 'Unpublished units will not be released'
 
-    class PublishState:
+    class PublishState(object):
+        """
+        Default values for representing the published state of a unit
+        """
         NEVER_PUBLISHED = 1
         UNPUBLISHED_CHANGES = 2
         PUBLISHED = 3
         VALUES = [NEVER_PUBLISHED, UNPUBLISHED_CHANGES, PUBLISHED]
 
-    class UnitState:
+    class UnitState(object):
         """ Represents the state of a unit """
 
         def __init__(self, is_released, publish_state, is_locked):