add priority into task config

job.go

@@ -156,6 +156,11 @@ func (j *AuroraJob) IsService(isService bool) *AuroraJob {
 	return j
 }
 
+func (j *AuroraJob) Priority(priority int32) *AuroraJob {
+	j.task.Priority(priority)
+	return j
+}
+
 func (j *AuroraJob) TaskConfig() *aurora.TaskConfig {
 	return j.task.TaskConfig()
 }

task.go

@@ -287,6 +287,12 @@ func (t *AuroraTask) IsService(isService bool) *AuroraTask {
 	return t
 }
 
+//set priority for preemption or priority-queueing
+func (t *AuroraTask) Priority(priority int32) *AuroraTask {
+	t.task.Priority = priority
+	return t
+}
+
 // Add a list of URIs with the same extract and cache configuration. Scheduler must have
 // --enable_mesos_fetcher flag enabled. Currently there is no duplicate detection.
 func (t *AuroraTask) AddURIs(extract bool, cache bool, values ...string) *AuroraTask {