FAB-5930 Upgrade to grpc-go v1.5.2

This updates grpc-go from version
1.4.0 to the latest version which is
1.5.2.  There are a few things we can
take advantage of in the future but it's
always a good idea to say current.

Most of the CR is just updating the
vendoring of the grpc and grpclog
packages.

A couple of changes where required to
some test files because v1.5.2 does not
allow you to register a service on a
running gRPC server.

Change-Id: Ia1499897426db9383801a5e717746f5c58b362e0
Signed-off-by: Gari Singh <gari.r.singh@gmail.com>

core/peer/peer_test.go

@@ -144,8 +144,6 @@ func TestCreateChainFromBlock(t *testing.T) {
 	grpcServer := grpc.NewServer()
 	socket, err := net.Listen("tcp", fmt.Sprintf("%s:%d", "", 13611))
 	assert.NoError(t, err)
-	go grpcServer.Serve(socket)
-	defer grpcServer.Stop()
 
 	msptesttools.LoadMSPSetupForTesting()
 
@@ -164,6 +162,9 @@ func TestCreateChainFromBlock(t *testing.T) {
 
 	assert.NoError(t, err)
 
+	go grpcServer.Serve(socket)
+	defer grpcServer.Stop()
+
 	err = CreateChainFromBlock(block)
 	if err != nil {
 		t.Fatalf("failed to create chain %s", err)

gossip/service/gossip_service_test.go

@@ -60,9 +60,6 @@ func TestInitGossipService(t *testing.T) {
 	socket, error := net.Listen("tcp", fmt.Sprintf("%s:%d", "", 5611))
 	assert.NoError(t, error)
 
-	go grpcServer.Serve(socket)
-	defer grpcServer.Stop()
-
 	msptesttools.LoadMSPSetupForTesting()
 	identity, _ := mgmt.GetLocalSigningIdentityOrPanic().Serialize()
 
@@ -80,6 +77,9 @@ func TestInitGossipService(t *testing.T) {
 	}
 	wg.Wait()
 
+	go grpcServer.Serve(socket)
+	defer grpcServer.Stop()
+
 	defer GetGossipService().Stop()
 	gossip := GetGossipService()