Fix a couple pylint violations

cms/djangoapps/contentstore/features/component.py

 #pylint: disable=C0111
 #pylint: disable=W0621
 
+# Lettuce formats proposed definitions for unimplemented steps with the
+# argument name "step" instead of "_step" and pylint does not like that.
+#pylint: disable=W0613
+
 from lettuce import world, step
 from nose.tools import assert_true, assert_in  # pylint: disable=E0611
 
@@ -67,7 +71,7 @@ def see_a_multi_step_component(step, category):
 def see_a_problem_component(step, category):
     component_css = 'section.xmodule_CapaModule'
     assert_true(world.is_css_present(component_css),
-        'No problem was added to the unit.')
+                'No problem was added to the unit.')
 
     problem_css = 'li.component section.xblock-student_view'
     actual_text = world.css_text(problem_css)