fix build, hardcode bunny version which actually works with current code
add ability to have multiple handler types; add test coverage for handlers
encapsulate error handler get/set
handle bunny connection errors
auto recover from mq server outage for producer
AD-627 - add airbrake handler to connection errors
remove unused instance variable
Merge pull request #3 from acl-services/error-handling

AD-627 - Error handling and auto recovery of connection failures on producer side