Always set a date for non-nil ORKResult startDate
Always set a date for non-nil ORKResult startDate

mluedke2/ResearchKit,mluedke2/ResearchKit,chb/ResearchKit,jeremiahyan/ResearchKit,chb/ResearchKit,md0u80c9/ResearchKit,md0u80c9/ResearchKit,mluedke2/ResearchKit,jeremiahyan/ResearchKit,chb/ResearchKit,md0u80c9/ResearchKit,md0u80c9/ResearchKit,jeremiahyan/ResearchKit,chb/ResearchKit