Update grafana/grafana Docker tag to v6.2.5
Update grafana/grafana Docker tag to v6.2.5

trungdtbk/faucet,gizmoguy/faucet,REANNZ/faucet,shivarammysore/faucet,anarkiwi/faucet,faucetsdn/faucet,anarkiwi/faucet,shivarammysore/faucet,trungdtbk/faucet,REANNZ/faucet,mwutzke/faucet,mwutzke/faucet,gizmoguy/faucet,faucetsdn/faucet