Add metric updating thread.
Add metric updating thread.

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