Prioritise delayed jobs

Created by: alexkh13

Description

When adding delayed jobs with priority to the queue, the priority is not affecting its placement in the waiting list.

Test code to reproduce

var normalPriority = [],
      highPriority = [];

highPriority.push(queue.add({p: 1}, {priority: 1, delay:2000}));

for(var i = 0; i < 4; i++){
   normalPriority.push(queue.add({p: 2}, {priority: 2}));
}

Promise.all(normalPriority, highPriority).then(function(){
   queue.process(function(job, jobDone){
      console.log(job.data.p);
      setTimeout(jobDone, 1000);
   });
});

The expected output of the above should be 2,2,1,2,2 But indeed we get 2,2,2,2,1

Bull version

Latest

Additional information

This is, of course, relevant to repeatable jobs as well