various fixes for broker and messaging in server (#1187)

* provide broker disconnect messages in server

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

* broker/eats: another fix

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

server/grpc/grpc.go

@@ -805,10 +805,7 @@ func (g *grpcServer) Start() error {
 			return err
 		}
 
-		baddr := config.Broker.Address()
-		bname := config.Broker.String()
-
-		log.Logf("Broker [%s] Connected to %s", bname, baddr)
+		log.Logf("Broker [%s] Connected to %s", config.Broker.String(), config.Broker.Address())
 	}
 
 	// announce self to the world
@@ -876,6 +873,7 @@ func (g *grpcServer) Start() error {
 		// close transport
 		ch <- nil
 
+		log.Logf("Broker [%s] Disconnected from %s", config.Broker.String(), config.Broker.Address())
 		// disconnect broker
 		config.Broker.Disconnect()
 	}()