Make now runs lint and any unit tests.

Also update vendored voltha-go to add new api updates

Change-Id: I08e11ae043b1db46fed4cc64fddc890a6729dedf
diff --git a/vendor/github.com/opencord/voltha-go/db/model/revision.go b/vendor/github.com/opencord/voltha-go/db/model/revision.go
index 2c10137..79620e1 100644
--- a/vendor/github.com/opencord/voltha-go/db/model/revision.go
+++ b/vendor/github.com/opencord/voltha-go/db/model/revision.go
@@ -17,10 +17,12 @@
 
 type Revision interface {
 	Finalize(bool)
+	IsDiscarded() bool
 	SetConfig(revision *DataRevision)
 	GetConfig() *DataRevision
 	Drop(txid string, includeConfig bool)
 	StorageDrop(txid string, includeConfig bool)
+	ChildDrop(childType string, childHash string)
 	SetChildren(name string, children []Revision)
 	GetChildren(name string) []Revision
 	SetAllChildren(children map[string][]Revision)