Create a ModelBroadcast. User can override how model is broadcast by extending this class to
create a customized ModelBroadcast. To enable customized broadcast factory, user need to specify
its full class name via system property bigdl.ModelBroadcastFactory.
Create a ModelBroadcast. User can override how model is broadcast by extending this class to create a customized ModelBroadcast. To enable customized broadcast factory, user need to specify its full class name via system property bigdl.ModelBroadcastFactory.