update hot_bunnies to march_hare, and more

lots of gem updates, primarily core and other travis related libs
wrap the enqueue service in begin,end block so we can get rescue errors and report them
Bump travis-core (cancel build amqp fix)
Bump travis-pro-core
Bump travis-core and travis-support (autoload changes)
Bump travis-core (metrics for enqueue)
Bump travis-core
Bump trvais-core (revert including oauth token in worker payload)
Update travis-core
Merge pull request #1 from travis-ci/master

latest from upstream