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/klog/OWNERS b/vendor/k8s.io/klog/OWNERS
index 56b0eb0..d0168e8 100644
--- a/vendor/k8s.io/klog/OWNERS
+++ b/vendor/k8s.io/klog/OWNERS
@@ -1,4 +1,4 @@
-# See the OWNERS docs: https://git.k8s.io/community/contributors/guide/owners.md
+# See the OWNERS docs at https://go.k8s.io/owners
 
 approvers:
   - dims