VOL-1497 : Add more control to kv/memory access

- Added kv locking mechanism (etcd only)
- (watch) control path access whenever possible
- (watch) use a transaction for updates and merge with memory
- cleaned up vendoring
- misc changes to fix exceptions found along the way

Amendments:

- Copyright header got removed in auto-generated file
- Changed default locking to false for KV list operation
- Updated backend api to allow the passing of locking parameter

Change-Id: Ie1a55d3ca8b9d92ae71a85ce42bb22fcf1419e2c
diff --git a/vendor/k8s.io/apimachinery/pkg/types/patch.go b/vendor/k8s.io/apimachinery/pkg/types/patch.go
index d522d1d..fe8ecaa 100644
--- a/vendor/k8s.io/apimachinery/pkg/types/patch.go
+++ b/vendor/k8s.io/apimachinery/pkg/types/patch.go
@@ -25,4 +25,5 @@
 	JSONPatchType           PatchType = "application/json-patch+json"
 	MergePatchType          PatchType = "application/merge-patch+json"
 	StrategicMergePatchType PatchType = "application/strategic-merge-patch+json"
+	ApplyPatchType          PatchType = "application/apply-patch+yaml"
 )