Use Rollbar constant in rollbar_bc_spec since we are testing backwards compatibility.
Use Rollbar constant in rollbar_bc_spec since we are testing backwards compatibility.

Just to test the old API exactly as it was.

joneslee85/rollbar-gem,redbubble/rollbar-gem,rollbar/rollbar-gem,dck/rollbar-gem,heshamnaim/rollbar-gem,heshamnaim/rollbar-gem,ptrln/rollbar-gem,monkbroc/rollbar-gem,joneslee85/rollbar-gem,fabn/rollbar-gem,redbubble/rollbar-gem,joneslee85/rollbar-gem,seekingalpha/rollbar-gem,redbubble/rollbar-gem,dck/rollbar-gem,dck/rollbar-gem,heshamnaim/rollbar-gem,rollbar/rollbar-gem,ptrln/rollbar-gem,seekingalpha/rollbar-gem,ptrln/rollbar-gem,seekingalpha/rollbar-gem,monkbroc/rollbar-gem,monkbroc/rollbar-gem,rollbar/rollbar-gem,fabn/rollbar-gem,fabn/rollbar-gem,crowdworks/rollbar-gem,crowdworks/rollbar-gem,crowdworks/rollbar-gem