Use voltha-protos version 4.0.2
Bump major version of voltha-lib-go to 4.0.0 as this change results
in incompatible API version compared to previous version

Change-Id: I1def58361fb1d85f07d6948ebf1ffb7a92eb0d4c
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 947a315..812b918 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -104,13 +104,14 @@
 github.com/modern-go/concurrent
 # github.com/modern-go/reflect2 v1.0.1
 github.com/modern-go/reflect2
-# github.com/opencord/voltha-protos/v3 v3.4.1
-github.com/opencord/voltha-protos/v3/go/common
-github.com/opencord/voltha-protos/v3/go/inter_container
-github.com/opencord/voltha-protos/v3/go/omci
-github.com/opencord/voltha-protos/v3/go/openflow_13
-github.com/opencord/voltha-protos/v3/go/tech_profile
-github.com/opencord/voltha-protos/v3/go/voltha
+# github.com/opencord/voltha-protos/v4 v4.0.2
+github.com/opencord/voltha-protos/v4/go/common
+github.com/opencord/voltha-protos/v4/go/ext/config
+github.com/opencord/voltha-protos/v4/go/inter_container
+github.com/opencord/voltha-protos/v4/go/omci
+github.com/opencord/voltha-protos/v4/go/openflow_13
+github.com/opencord/voltha-protos/v4/go/tech_profile
+github.com/opencord/voltha-protos/v4/go/voltha
 # github.com/opentracing/opentracing-go v1.1.0
 github.com/opentracing/opentracing-go
 github.com/opentracing/opentracing-go/ext