fix rake commands to work in development mode on linux (no sudo)

what isn't working? the Rakefile has this check already:

RakeUtils.stop_service CDO.dashboard_unicorn_name unless rack_env?(:development)
RakeUtils.start_service CDO.dashboard_unicorn_name unless rack_env?(:development)
RakeUtils.stop_service CDO.pegasus_unicorn_name unless rack_env?(:development)
RakeUtils.start_service CDO.pegasus_unicorn_name unless rack_env?(:development)