docker: add dns for ubuntu os install, change INTERFACES to em1 for test stack
docker: add dns for ubuntu os install, change INTERFACES to em1 for test stack

johren/RackHD,srinia6/RackHD,changev/RackHD,patelb10/RackHD,panpan0000/RackHD,RackHD-Mirror/RackHD,hohene/RackHD,panpan0000/RackHD,panpan0000/RackHD,johren/RackHD,uppalk1/RackHD,johren/RackHD,hohene/RackHD,geoff-reid/RackHD,RackHD/RackHD,hohene/RackHD,RackHD-Mirror/RackHD,patelb10/RackHD,uppalk1/RackHD,geoff-reid/RackHD,changev/RackHD,RackHD-Mirror/RackHD,patelb10/RackHD,johren/RackHD,uppalk1/RackHD,RackHD/RackHD,geoff-reid/RackHD,hohene/RackHD,RackHD/RackHD,RackHD-Mirror/RackHD,panpan0000/RackHD,changev/RackHD,srinia6/RackHD,changev/RackHD,geoff-reid/RackHD,srinia6/RackHD,uppalk1/RackHD,RackHD/RackHD,patelb10/RackHD,srinia6/RackHD