Splitter can mutate the original network

[arvoelke]

nengo-loihi/nengo_loihi/splitter.py

Lines 61 to 64 in 1517915

	self.host = Network(seed=original.seed)
	self.chip = Network(seed=original.seed)
	self.host_pre = Network(seed=original.seed)

^ Should pass add_to_container=False, otherwise weird things can happen like in the following code:

with nengo.Network() as model:
    
    x = nengo.Ensemble(100, 1)
    
    with nengo_loihi.Simulator(model) as sim:
        pass

    print(model.all_networks)

(prints 3 networks)

Each split adds all of the splitter sub-networks to the original model. Note this only happens if the simulator is constructed from within the context manager of some network.