[VOL-5245] -- post-release patch

VERSION
go.mod
go.sum
vendor/modules.txt
------------------
  o Update voltha-protos (version:v5.5.0) for branch=master.

Change-Id: I4641543d18918ff42cd579435e918828df2cf1d5
diff --git a/go.mod b/go.mod
index 3d5052e..237d46d 100644
--- a/go.mod
+++ b/go.mod
@@ -34,7 +34,7 @@
 	github.com/jhump/protoreflect v1.10.2
 	github.com/jonboulle/clockwork v0.2.2 // indirect
 	github.com/onsi/gomega v1.14.0 // indirect
-	github.com/opencord/voltha-protos/v5 v5.4.10
+	github.com/opencord/voltha-protos/v5 v5.5.0
 	github.com/opentracing/opentracing-go v1.2.0
 	github.com/phayes/freeport v0.0.0-20180830031419-95f893ade6f2
 	github.com/prometheus/client_golang v1.11.0