RFR: JDK-8069051 IAE at DeviceManager.register if name and properties are NULL

[Sergey Nazarkin]

issue: https://bugs.openjdk.java.net/browse/JDK-8069051
webrev: http://cr.openjdk.java.net/~snazarki/8069051/

Fix for unexpected IllegalArgumentException at DeviceManager.register() 
if desired name is NULL and properties list is empty


-- /Sergey