Add tests for heartbeat response in Bolt and SimpleBolt
Add tests for heartbeat response in Bolt and SimpleBolt

Yelp/pyleus,imcom/pyleus,mzbyszynski/pyleus,patricklucas/pyleus,imcom/pyleus,dapuck/pyleus,stallman-cui/pyleus,poros/pyleus,poros/pyleus,stallman-cui/pyleus,patricklucas/pyleus,Yelp/pyleus,imcom/pyleus,dapuck/pyleus,jirafe/pyleus,jirafe/pyleus,mzbyszynski/pyleus