Move pkg/util.Time to pkg/api/unversioned.Time

Along with our time.Duration wrapper, as suggested by @lavalamp.

docs/proposals/compute-resource-metrics-api.md

@@ -161,7 +161,7 @@ type MetricsWindows map[time.Duration]DerivedMetrics
 
 type DerivedMetrics struct {
 	// End time of all the time windows in Metrics
-	EndTime util.Time `json:"endtime"`
+	EndTime unversioned.Time `json:"endtime"`
 
 	Mean       ResourceUsage `json:"mean"`
 	Max        ResourceUsage `json:"max"`

docs/proposals/horizontal-pod-autoscaler.md

@@ -162,7 +162,7 @@ type HorizontalPodAutoscalerStatus struct {
 
 	// LastScaleTimestamp is the last time the HorizontalPodAutoscaler scaled the number of pods.
 	// This is used by the autoscaler to control how often the number of pods is changed.
-	LastScaleTimestamp *util.Time
+	LastScaleTimestamp *unversioned.Time
 }
 
 // ResourceConsumption is an object for specifying average resource consumption of a particular resource.

docs/proposals/job.md

@@ -131,13 +131,13 @@ type JobStatus struct {
     Conditions []JobCondition
 
     // CreationTime represents time when the job was created
-    CreationTime util.Time
+    CreationTime unversioned.Time
 
     // StartTime represents time when the job was started
-    StartTime util.Time
+    StartTime unversioned.Time
 
     // CompletionTime represents time when the job was completed
-    CompletionTime util.Time
+    CompletionTime unversioned.Time
 
     // Active is the number of actively running pods.
     Active int
@@ -162,8 +162,8 @@ const (
 type JobCondition struct {
     Type               JobConditionType
     Status             ConditionStatus
-    LastHeartbeatTime  util.Time
-    LastTransitionTime util.Time
+    LastHeartbeatTime  unversioned.Time
+    LastTransitionTime unversioned.Time
     Reason             string
     Message            string
 }