Update omci-lib-go to 2.2.0 and use new ME attribute constants instead of strings

Change-Id: If0bee47bede5e02c70f73c6c615bafc55d1389d5
diff --git a/vendor/github.com/opencord/omci-lib-go/v2/generated/relaxed.go b/vendor/github.com/opencord/omci-lib-go/v2/generated/relaxed.go
index a1e49d3..d733c91 100644
--- a/vendor/github.com/opencord/omci-lib-go/v2/generated/relaxed.go
+++ b/vendor/github.com/opencord/omci-lib-go/v2/generated/relaxed.go
@@ -1,13 +1,13 @@
 /*
  * Copyright (c) 2018 - present.  Boling Consulting Solutions (bcsw.net)
  * Copyright 2020-present Open Networking Foundation
-
+ *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
-
+ *
  * http://www.apache.org/licenses/LICENSE-2.0
-
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -20,6 +20,7 @@
  * Generated by 'goCodeGenerator.py':
  *              https://github.com/cboling/OMCI-parser/README.md
  */
+
 package generated
 
 import (