Merge pull request volcano-sh#24 from shivramsrivastava/eventsfix_cherrypk

[CHERRY-PICK] Fixed the Pod failure event reason string for the k8s conformance tes…

Author: volcano-sh-bot

pkg/scheduler/cache/cache.go

@@ -465,7 +465,10 @@ func (sc *SchedulerCache) taskUnschedulable(task *api.TaskInfo, message string)
 
 	pod := task.Pod.DeepCopy()
 
-	sc.Recorder.Eventf(pod, v1.EventTypeWarning, string(v1.PodReasonUnschedulable), message)
+	// The reason field in 'Events' should be "FailedScheduling", there is not constants defined for this in
+	// k8s core, so using the same string here.
+	// The reason field in PodCondition should be "Unschedulable"
+	sc.Recorder.Eventf(pod, v1.EventTypeWarning, "FailedScheduling", message)
 	if _, err := sc.StatusUpdater.UpdatePodCondition(pod, &v1.PodCondition{
 		Type:    v1.PodScheduled,
 		Status:  v1.ConditionFalse,