add a negative test case for rtm connects
add a negative test case for rtm connects

EliKrumholz/botkit,howdyai/botkit,dhulser/slack-reporting-bot,ductran96/botkit,ouadie-lahdioui/botkit,twhit027/lewd-bot,grindcore819/slackathonMTL,amritg/botkit,adam-nnl/omgwtfbbq-bot,howdyai/botkit,howdyai/botkit,Philipp-Werminghausen/chuck-norris,stopsatgreen/botkit-messenger,n0bisuke/slack-bot,nhindman/airbnb_bot,pickettd/slack-oregon-trail,DJ1K1/botkit,naokie/botkit,DJ1K1/botkit,cbuehnerkemper/botkit-copy,samuelsan/YelpBot,Catscadia/botkit,acrollet/botkit,vuquangtuan/botkit,dotstudio/slack-bot,tmtkg/botkit,stopsatgreen/botkit-slack,healthchatnow/hcn,sakimyto/papabot121,myochum/Triviabot,dcortes22/picnic,michaesw/botkit,gabrielfirmacion/frontdoor-demo,howdyai/botkit