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/ethernetpseudowireparameters.go b/vendor/github.com/opencord/omci-lib-go/v2/generated/ethernetpseudowireparameters.go
index cd64e28..a6dd980 100644
--- a/vendor/github.com/opencord/omci-lib-go/v2/generated/ethernetpseudowireparameters.go
+++ b/vendor/github.com/opencord/omci-lib-go/v2/generated/ethernetpseudowireparameters.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.
@@ -54,10 +54,14 @@
 	Attributes AttributeValueMap
 }
 
+// Attribute name constants
+
+const EthernetPseudowireParameters_Mtu = "Mtu"
+
 func init() {
 	ethernetpseudowireparametersBME = &ManagedEntityDefinition{
 		Name:    "EthernetPseudowireParameters",
-		ClassID: 400,
+		ClassID: EthernetPseudowireParametersClassID,
 		MessageTypes: mapset.NewSetWith(
 			Create,
 			Delete,
@@ -66,8 +70,8 @@
 		),
 		AllowedAttributeMask: 0x8000,
 		AttributeDefinitions: AttributeDefinitionMap{
-			0: Uint16Field("ManagedEntityId", PointerAttributeType, 0x0000, 0, mapset.NewSetWith(Read, SetByCreate), false, false, false, 0),
-			1: Uint16Field("Mtu", UnsignedIntegerAttributeType, 0x8000, 0, mapset.NewSetWith(Read, SetByCreate, Write), false, false, false, 1),
+			0: Uint16Field(ManagedEntityID, PointerAttributeType, 0x0000, 0, mapset.NewSetWith(Read, SetByCreate), false, false, false, 0),
+			1: Uint16Field(EthernetPseudowireParameters_Mtu, UnsignedIntegerAttributeType, 0x8000, 0, mapset.NewSetWith(Read, SetByCreate, Write), false, false, false, 1),
 		},
 		Access:  CreatedByOlt,
 		Support: UnknownSupport,