[VOL-3255] enhancement to support device metrics

Change-Id: Ic26c2db30a58943a4eef6276ae1cf40350d51702
diff --git a/vendor/google.golang.org/grpc/go.mod b/vendor/google.golang.org/grpc/go.mod
new file mode 100644
index 0000000..ecef1ab
--- /dev/null
+++ b/vendor/google.golang.org/grpc/go.mod
@@ -0,0 +1,16 @@
+module google.golang.org/grpc
+
+go 1.11
+
+require (
+	github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f
+	github.com/envoyproxy/go-control-plane v0.9.4
+	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
+	github.com/golang/mock v1.1.1
+	github.com/golang/protobuf v1.3.3
+	github.com/google/go-cmp v0.2.0
+	golang.org/x/net v0.0.0-20190311183353-d8887717615a
+	golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be
+	golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a
+	google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55
+)