shutdown mininet in tearDown() before anything else.
shutdown mininet in tearDown() before anything else.

gizmoguy/faucet,REANNZ/faucet,REANNZ/faucet,trentindav/faucet,Bairdo/faucet,anarkiwi/faucet,shivarammysore/faucet,wackerly/faucet,trentindav/faucet,anarkiwi/faucet,faucetsdn/faucet,shivarammysore/faucet,byllyfish/faucet,mwutzke/faucet,trungdtbk/faucet,wackerly/faucet,gizmoguy/faucet,faucetsdn/faucet,trungdtbk/faucet,byllyfish/faucet,mwutzke/faucet,Bairdo/faucet