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/api/storage/v1/generated.proto b/vendor/k8s.io/api/storage/v1/generated.proto
index 7ac6cb2..668c854 100644
--- a/vendor/k8s.io/api/storage/v1/generated.proto
+++ b/vendor/k8s.io/api/storage/v1/generated.proto
@@ -178,7 +178,7 @@
   optional k8s.io.apimachinery.pkg.apis.meta.v1.Time time = 1;
 
   // String detailing the error encountered during Attach or Detach operation.
-  // This string may be logged, so it should not contain sensitive
+  // This string maybe logged, so it should not contain sensitive
   // information.
   // +optional
   optional string message = 2;
diff --git a/vendor/k8s.io/api/storage/v1/types.go b/vendor/k8s.io/api/storage/v1/types.go
index bd60e10..9f2f67b 100644
--- a/vendor/k8s.io/api/storage/v1/types.go
+++ b/vendor/k8s.io/api/storage/v1/types.go
@@ -204,7 +204,7 @@
 	Time metav1.Time `json:"time,omitempty" protobuf:"bytes,1,opt,name=time"`
 
 	// String detailing the error encountered during Attach or Detach operation.
-	// This string may be logged, so it should not contain sensitive
+	// This string maybe logged, so it should not contain sensitive
 	// information.
 	// +optional
 	Message string `json:"message,omitempty" protobuf:"bytes,2,opt,name=message"`
diff --git a/vendor/k8s.io/api/storage/v1/types_swagger_doc_generated.go b/vendor/k8s.io/api/storage/v1/types_swagger_doc_generated.go
index e31dd7f..d4a022d 100644
--- a/vendor/k8s.io/api/storage/v1/types_swagger_doc_generated.go
+++ b/vendor/k8s.io/api/storage/v1/types_swagger_doc_generated.go
@@ -109,7 +109,7 @@
 var map_VolumeError = map[string]string{
 	"":        "VolumeError captures an error encountered during a volume operation.",
 	"time":    "Time the error was encountered.",
-	"message": "String detailing the error encountered during Attach or Detach operation. This string may be logged, so it should not contain sensitive information.",
+	"message": "String detailing the error encountered during Attach or Detach operation. This string maybe logged, so it should not contain sensitive information.",
 }
 
 func (VolumeError) SwaggerDoc() map[string]string {