'``same_node`` returns ``True`` if two ``Node``s have the same UUID.'

def test_node(self):

    node1 = Node(uuid=uuid4(), hostname=u'1.2.3.4')
    node2 = Node(uuid=node1.uuid, hostname=u'1.2.3.5')
    node3 = Node(uuid=uuid4(), hostname=u'1.2.3.4')
    self.assertEqual([same_node(node1, node2), same_node(node1, node3)], [True, False])
