Update TODO for handling failure of redundant DPs in stacking.
Update TODO for handling failure of redundant DPs in stacking.

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