Allow tests to get hardware switch config from /etc/ryu/faucet.
Allow tests to get hardware switch config from /etc/ryu/faucet.

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