dbus: Rename to org.bluez.Device1

Trivially add the numbering suffix to org.bluez.Device according to
the proposal for BlueZ 5.
diff --git a/test/bluezutils.py b/test/bluezutils.py
index 70fe01b..803805b 100644
--- a/test/bluezutils.py
+++ b/test/bluezutils.py
@@ -2,7 +2,7 @@
 
 SERVICE_NAME = "org.bluez"
 ADAPTER_INTERFACE = SERVICE_NAME + ".Adapter"
-DEVICE_INTERFACE = SERVICE_NAME + ".Device"
+DEVICE_INTERFACE = SERVICE_NAME + ".Device1"
 
 def get_managed_objects():
 	bus = dbus.SystemBus()