Fixes races in test and klog (#3079)

Various fixes to make things less flaky:

* kubernetes: put klog.SetOutput in the setup function, not in the init
  function to see if that helps
* file: make z.Expired a boolean instead of a pointer to a boolean
* test: fix TestSecondaryZoneTransfer test, which wasn't actually
  testing in the right way. It's more right now, but may still be racy
  (race introduced because a file's lazy loading of zones)

Signed-off-by: Miek Gieben <miek@miek.nl>

plugin/file/secondary.go

@@ -54,7 +54,7 @@ Transfer:
 	z.Lock()
 	z.Tree = z1.Tree
 	z.Apex = z1.Apex
-	*z.Expired = false
+	z.Expired = false
 	z.Unlock()
 	log.Infof("Transferred: %s from %s", z.origin, tr)
 	return nil
@@ -129,7 +129,7 @@ Restart:
 			if !retryActive {
 				break
 			}
-			*z.Expired = true
+			z.Expired = true
 
 		case <-retryTicker.C:
 			if !retryActive {