vendor: fix data race in github.com/armon/go-metrics/start.go
vendor: fix data race in github.com/armon/go-metrics/start.go

96 -> 42 data races

calgaryscientific/consul,tugbabodrumlu/consul,i0rek/consul,hashicorp/consul,zeroae/consul,calgaryscientific/consul,kingland/consul,42wim/consul,i0rek/consul,calgaryscientific/consul,hashicorp/consul,kingland/consul,sweeneyb/consul,i0rek/consul,scalp42/consul,vamage/consul,tugbabodrumlu/consul,hashicorp/consul,youhong316/consul,sweeneyb/consul,hashicorp/consul,scalp42/consul,zeroae/consul,sweeneyb/consul,42wim/consul,vamage/consul,tugbabodrumlu/consul,i0rek/consul,kingland/consul,kingland/consul,youhong316/consul,sweeneyb/consul,i0rek/consul,vamage/consul,youhong316/consul,calgaryscientific/consul,calgaryscientific/consul,youhong316/consul,youhong316/consul,scalp42/consul,tugbabodrumlu/consul,sweeneyb/consul,42wim/consul,vamage/consul,42wim/consul,scalp42/consul,zeroae/consul,42wim/consul,tugbabodrumlu/consul,kingland/consul,zeroae/consul,scalp42/consul,vamage/consul,zeroae/consul