def queuing_started(self):
        self.queuing = True
Create a 2-switch, 2-host linear topology on each mininet vm
dataset/ETHPy150Open quid/s3concurrent/s3concurrent/s3concurrent.py/ProcessKeyQueue.queuing_started--crossover with--dataset/ETHPy150Open fp7-ofelia/ocf/expedient/src/python/plugins/openflow/tests/full/fulltests.py/FullIntegration.connect_networks