versions: add v2015_SP5
versions: add v2015_SP5

juggernate/pymel,david-lassonde-adsk/pymel,david-lassonde-adsk/pymel,assumptionsoup/pymel,juggernate/pymel,AtonLerin/pymel,AtonLerin/pymel,shrtcww/pymel,leonsooi/pymel,leonsooi/pymel,shrtcww/pymel,assumptionsoup/pymel