client: ensure cancel is always called when func exits
client: ensure cancel is always called when func exits

dvusboy/nomad,burdandrei/nomad,burdandrei/nomad,hashicorp/nomad,dvusboy/nomad,burdandrei/nomad,dvusboy/nomad,nak3/nomad,hashicorp/nomad,dvusboy/nomad,nak3/nomad,dvusboy/nomad,hashicorp/nomad,hashicorp/nomad,hashicorp/nomad,dvusboy/nomad,nak3/nomad,burdandrei/nomad,nak3/nomad,nak3/nomad,nak3/nomad,hashicorp/nomad,dvusboy/nomad,burdandrei/nomad,nak3/nomad,burdandrei/nomad,burdandrei/nomad