test_remotenodeprocessor.py was constructing a Message incorrectly

[Poikilos]

This test in test_remotenodeprocessor.py was formerly:

    def testNewNodeSeen(self) :
        self.node21.state = Node.State.Initialized
        msg = Message(MTI.New_Node_Seen, NodeID(21), [])
        self.processor.process(msg, self.node21)

and I changed [] to bytearray()
but adding type checking to the constructor showed that the
test was wrong. What should it actually be?
The 3rd argument should be a destination node, and the last (optional) argument should be data.
For now I changed it to:

    def testNewNodeSeen(self) :
        self.node21.state = Node.State.Initialized
        msg = Message(MTI.New_Node_Seen, NodeID(21), NodeID(0), data=bytearray())
        self.processor.process(msg, self.node21)

The test passes now, but please let me know if any further changes are necessary.

It passed before because:

• The argument wasn't checked for validity in the Message constructor.
• The destination is never used in the test (Is that ok in this case?)