[VOL-4290] Voltha go library updates for gRPC migration

Change-Id: I1aa2774beb6b7ed7419bc45aeb53fcae8a8ecda0
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_httpbodyproto.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_httpbodyproto.go
index f55285b..525b033 100644
--- a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_httpbodyproto.go
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_httpbodyproto.go
@@ -19,7 +19,7 @@
 	Marshaler
 }
 
-// ContentType implementation to keep backwards compatability with marshal interface
+// ContentType implementation to keep backwards compatibility with marshal interface
 func (h *HTTPBodyMarshaler) ContentType() string {
 	return h.ContentTypeFromMessage(nil)
 }