VOL-3978 - update to go 1.16.3

Change-Id: I4a1c78722b3e4019dfd288fa9c89b7d90924050a
diff --git a/vendor/modules.txt b/vendor/modules.txt
index e81b015..7d23c9d 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -1,5 +1,3 @@
-# github.com/armon/go-metrics v0.0.0-20190430140413-ec5e00d3c878
-github.com/armon/go-metrics
 # github.com/coreos/go-systemd v0.0.0-20190620071333-e64a0ec8b42a
 github.com/coreos/go-systemd/journal
 # github.com/coreos/pkg v0.0.0-20180108230652-97fdf19511ea
@@ -7,10 +5,12 @@
 # github.com/davecgh/go-spew v1.1.1
 github.com/davecgh/go-spew/spew
 # github.com/gogo/protobuf v1.3.1
+## explicit
 github.com/gogo/protobuf/gogoproto
 github.com/gogo/protobuf/proto
 github.com/gogo/protobuf/protoc-gen-gogo/descriptor
 # github.com/golang/protobuf v1.3.2
+## explicit
 github.com/golang/protobuf/proto
 github.com/golang/protobuf/protoc-gen-go/descriptor
 github.com/golang/protobuf/ptypes
@@ -21,43 +21,32 @@
 # github.com/google/uuid v1.1.1
 github.com/google/uuid
 # github.com/grpc-ecosystem/go-grpc-middleware v1.0.1-0.20190118093823-f849b5445de4
+## explicit
 github.com/grpc-ecosystem/go-grpc-middleware
 github.com/grpc-ecosystem/go-grpc-middleware/tags
 github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing
 github.com/grpc-ecosystem/go-grpc-middleware/util/metautils
-# github.com/hashicorp/consul/api v1.2.0
-github.com/hashicorp/consul/api
-# github.com/hashicorp/go-cleanhttp v0.5.1
-github.com/hashicorp/go-cleanhttp
-# github.com/hashicorp/go-immutable-radix v1.1.0
-github.com/hashicorp/go-immutable-radix
-# github.com/hashicorp/go-rootcerts v1.0.1
-github.com/hashicorp/go-rootcerts
-# github.com/hashicorp/golang-lru v0.5.3
-github.com/hashicorp/golang-lru/simplelru
-# github.com/hashicorp/serf v0.8.4
-github.com/hashicorp/serf/coordinate
-# github.com/mitchellh/go-homedir v1.1.0
-github.com/mitchellh/go-homedir
-# github.com/mitchellh/mapstructure v1.1.2
-github.com/mitchellh/mapstructure
 # github.com/opencord/goloxi v1.0.1
+## explicit
 github.com/opencord/goloxi
 github.com/opencord/goloxi/of13
-# github.com/opencord/voltha-lib-go/v4 v4.0.2
+# github.com/opencord/voltha-lib-go/v4 v4.2.3
+## explicit
 github.com/opencord/voltha-lib-go/v4/pkg/config
 github.com/opencord/voltha-lib-go/v4/pkg/db
 github.com/opencord/voltha-lib-go/v4/pkg/db/kvstore
 github.com/opencord/voltha-lib-go/v4/pkg/log
 github.com/opencord/voltha-lib-go/v4/pkg/probe
 github.com/opencord/voltha-lib-go/v4/pkg/version
-# github.com/opencord/voltha-protos/v4 v4.0.7
+# github.com/opencord/voltha-protos/v4 v4.1.0
+## explicit
 github.com/opencord/voltha-protos/v4/go/common
 github.com/opencord/voltha-protos/v4/go/ext/config
 github.com/opencord/voltha-protos/v4/go/omci
 github.com/opencord/voltha-protos/v4/go/openflow_13
 github.com/opencord/voltha-protos/v4/go/voltha
 # github.com/opentracing/opentracing-go v1.2.0
+## explicit
 github.com/opentracing/opentracing-go
 github.com/opentracing/opentracing-go/ext
 github.com/opentracing/opentracing-go/log
@@ -66,6 +55,7 @@
 # github.com/pmezard/go-difflib v1.0.0
 github.com/pmezard/go-difflib/difflib
 # github.com/stretchr/testify v1.4.0
+## explicit
 github.com/stretchr/testify/assert
 # github.com/uber/jaeger-client-go v2.23.1+incompatible
 github.com/uber/jaeger-client-go
@@ -120,6 +110,7 @@
 go.uber.org/zap/internal/exit
 go.uber.org/zap/zapcore
 # golang.org/x/net v0.0.0-20191112182307-2180aed22343
+## explicit
 golang.org/x/net/context
 golang.org/x/net/http/httpguts
 golang.org/x/net/http2
@@ -138,6 +129,7 @@
 google.golang.org/genproto/googleapis/api/annotations
 google.golang.org/genproto/googleapis/rpc/status
 # google.golang.org/grpc v1.25.1
+## explicit
 google.golang.org/grpc
 google.golang.org/grpc/backoff
 google.golang.org/grpc/balancer