added question_controller_spec.rb file
skeleton of question controller spec
created before instances for question controller spec
passing get index and get show tests
post create test working
working on put update test
added post delete rspec test for questions controller
added question_set_id to strong params for question
added pry-byebug
added put#update controller rspec test
added redirect to class groups index when logged in
added class group model validation tests
added error spec when class group name is blank
removed space