updated cadvisor version

vendor/github.com/google/cadvisor/container/docker/handler.go

@@ -294,7 +294,10 @@ func (h *dockerFsHandler) Usage() (uint64, uint64) {
 	if h.thinPoolWatcher != nil {
 		thinPoolUsage, err := h.thinPoolWatcher.GetUsage(h.deviceID)
 		if err != nil {
-			glog.Errorf("unable to get fs usage from thin pool for device %v: %v", h.deviceID, err)
+			// TODO: ideally we should keep track of how many times we failed to get the usage for this
+			// device vs how many refreshes of the cache there have been, and display an error e.g. if we've
+			// had at least 1 refresh and we still can't find the device.
+			glog.V(5).Infof("unable to get fs usage from thin pool for device %s: %v", h.deviceID, err)
 		} else {
 			baseUsage = thinPoolUsage
 			usage += thinPoolUsage