only initialize docker clients if they are nil
only initialize docker clients if they are nil

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