Fix flake8 E305 errors.

awx/api/views.py

@@ -1736,6 +1736,7 @@ class GroupList(ListCreateAPIView):
     serializer_class = GroupSerializer
     capabilities_prefetch = ['inventory.admin', 'inventory.adhoc', 'inventory.update']
 
+
 '''
 Useful when you have a self-refering ManyToManyRelationship.
 * Tower uses a shallow (2-deep only) url pattern. For example:
@@ -4013,7 +4014,6 @@ class RoleChildrenList(SubListAPIView):
         return Role.filter_visible_roles(self.request.user, role.children.all())
 
 
-
 # Create view functions for all of the class-based views to simplify inclusion
 # in URL patterns and reverse URL lookups, converting CamelCase names to
 # lowercase_with_underscore (e.g. MyView.as_view() becomes my_view).