Integrate ActiveJob / DeliverLater / GlobalID with Rails

WIP.
Actually I wanted to remove this and add a :default_queue_name. If the queue is specified in the job it will use it or else it will use the default_queue_name.
I see no point in having my queue prefixed by something. For some of the adapter you need to specify on which queue to listen for and for newcomers the default configuration will "not be so good" :). Also the default_queue should be `default`. I think most of the adapter listen on default so new users will have better defaults.

/cc @dhh