fix APIv2 pods top of non-exist pod gets two response value

Signed-off-by: zhangguanzhang <zhangguanzhang@qq.com>

pkg/api/handlers/libpod/pods.go

@@ -327,7 +327,7 @@ func PodTop(w http.ResponseWriter, r *http.Request) {
 	name := utils.GetName(r)
 	pod, err := runtime.LookupPod(name)
 	if err != nil {
-		utils.ContainerNotFound(w, name, err)
+		utils.PodNotFound(w, name, err)
 		return
 	}
 

test/apiv2/40-pods.at

@@ -102,6 +102,10 @@ t GET libpod/pods/stats?namesOrIDs=fakename 404 \
 
 t DELETE  libpod/pods/bar?force=true 200
 
+# test the fake name
+t GET libpod/pods/fakename/top 404 \
+  .cause="no such pod"
+
 t GET libpod/pods/foo/top 200 \
   .Processes[0][-1]="/pause " \
   .Titles[-1]="COMMAND"