#29 Metrics for vpp agent (#136)

* #29 Metrics chain element for VPP agent

Signed-off-by: Andrey Sobolev <haiodo@gmail.com>

* Fix review comments

Signed-off-by: Andrey Sobolev <haiodo@gmail.com>

* Correct logging

Correct logging

Signed-off-by: Andrey Sobolev <haiodo@gmail.com>

* Update to latest vppagent

Update to latest vppagent

Signed-off-by: Andrey Sobolev <haiodo@gmail.com>

go.mod

@@ -10,9 +10,10 @@ require (
 	github.com/onsi/gomega v1.8.1 // indirect
 	github.com/open-policy-agent/opa v0.16.1
 	github.com/pkg/errors v0.9.1
-	github.com/sirupsen/logrus v1.4.2
+	github.com/sirupsen/logrus v1.5.0
 	github.com/stretchr/testify v1.4.0
-	go.ligato.io/vpp-agent/v3 v3.0.1
-	google.golang.org/grpc v1.27.0
+	go.ligato.io/vpp-agent/v3 v3.1.0
+	golang.org/x/sys v0.0.0-20200331124033-c3d80250170d // indirect
+	google.golang.org/grpc v1.27.1
 	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
 )