Production of Hyundai Motor’s Genesis luxury vehicle at its Ulsan plant remained suspended for a second day Tuesday, as a labor standoff over staffing requirements for new models showed no sign of a breakthrough. The assembly line for Genesis models at Hyundai Motor’s Plant 5 in Ulsan, southeastern South Korea, remained idle Tuesday, following a shutdown that began Monday, according to industry sources. The line normally begins operations at 6:45 a.m. but production had yet to resume as of Tuesd