gRPC migration update

Change-Id: Icdd1a824948fa994cd36bd121c962f5ecf74e3cf
diff --git a/vendor/github.com/coreos/go-semver/NOTICE b/vendor/github.com/coreos/go-semver/NOTICE
new file mode 100644
index 0000000..23a0ada
--- /dev/null
+++ b/vendor/github.com/coreos/go-semver/NOTICE
@@ -0,0 +1,5 @@
+CoreOS Project
+Copyright 2018 CoreOS, Inc
+
+This product includes software developed at CoreOS, Inc.
+(http://www.coreos.com/).