Discard log output from Vat heal during tests

pkg/transformers/vat_heal/vat_heal_suite_test.go

@@ -1,6 +1,8 @@
 package vat_heal_test
 
 import (
+	"io/ioutil"
+	"log"
 	"testing"
 
 	. "github.com/onsi/ginkgo"
@@ -11,3 +13,7 @@ func TestVatHeal(t *testing.T) {
 	RegisterFailHandler(Fail)
 	RunSpecs(t, "VatHeal Suite")
 }
+
+var _ = BeforeSuite(func() {
+	log.SetOutput(ioutil.Discard)
+})