prow/plank/controller.go
func (c *Controller) incrementNumPendingJobs(job string) {
	c.lock.Lock()
	defer c.lock.Unlock()
	c.pendingJobs[job]++
}
func (c *Controller) incrementNumPendingJobs(job string) {
	c.lock.Lock()
	defer c.lock.Unlock()
	c.pendingJobs[job]++
}
// incrementNumPendingJobs increments the amount of
// pending ProwJobs for the given job identifier