Support list types for engine opts
Support list types for engine opts

ibuildthecloud/os,SvenDowideit/os,rancherio/os,ibuildthecloud/os,rancher/os,juliengk/os,rancherio/os,rancherio/os,gizmotronic/os,rancher/os,SvenDowideit/os,juliengk/os,gizmotronic/os