Change messages_controller_spec.rb to use test flash[:alert] instead of flash[:error].
Change messages_controller_spec.rb to use test flash[:alert] instead of
flash[:error].

nyc-mud-turtles-2015/nghborly,nyc-mud-turtles-2015/nghborly,kimchanyoung/nghborly,kimchanyoung/nghborly,nyc-mud-turtles-2015/nghborly,kimchanyoung/nghborly