[VOL-3548] BBSim support for reboot vs disconnect

Change-Id: I6ea2a8a510a6ed17d040d3572a04fc988866116f
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 50b5477..4ab1d08 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -77,7 +77,7 @@
 # github.com/opencord/omci-lib-go v0.15.4
 github.com/opencord/omci-lib-go
 github.com/opencord/omci-lib-go/generated
-# github.com/opencord/voltha-protos/v4 v4.0.2
+# github.com/opencord/voltha-protos/v4 v4.0.15
 github.com/opencord/voltha-protos/v4/go/common
 github.com/opencord/voltha-protos/v4/go/ext/config
 github.com/opencord/voltha-protos/v4/go/openolt