Add suportsSecureCoding to ORKWaitStep, addressing unit test issue.
Add suportsSecureCoding to ORKWaitStep, addressing unit test issue.

oliverschaefer/ResearchKit,boland25/ResearchKit,oliverschaefer/ResearchKit,md0u80c9/ResearchKit,shazino/ResearchKit,weijentu/ResearchKit,md0u80c9/ResearchKit,md0u80c9/ResearchKit,chb/ResearchKit,boland25/ResearchKit,oliverschaefer/ResearchKit,chb/ResearchKit,shazino/ResearchKit,weijentu/ResearchKit,jeremiahyan/ResearchKit,YuanZhu-apple/ResearchKit,QuintilesRK/ResearchKit,md0u80c9/ResearchKit,cornelltech/ResearchKit,umerkhan-apple/ResearchKit,boland25/ResearchKit,allen7wang/ResearchKit,chb/ResearchKit,weijentu/ResearchKit,QuintilesRK/ResearchKit,mluedke2/ResearchKit,chb/ResearchKit,QuintilesRK/ResearchKit,jimmyti/ResearchKit,cornelltech/ResearchKit,weijentu/ResearchKit,cornelltech/ResearchKit,mluedke2/ResearchKit,KaiCode2/ResearchKit,YuanZhu-apple/ResearchKit,YuanZhu-apple/ResearchKit,jarrelscy/ResearchKit,jarrelscy/ResearchKit,umerkhan-apple/ResearchKit,jarrelscy/ResearchKit,jeremiahyan/ResearchKit,jeremiahyan/ResearchKit,shazino/ResearchKit,KaiCode2/ResearchKit,allen7wang/ResearchKit,allen7wang/ResearchKit,oliverschaefer/ResearchKit,umerkhan-apple/ResearchKit,KaiCode2/ResearchKit,jimmyti/ResearchKit,mluedke2/ResearchKit,jimmyti/ResearchKit,boland25/ResearchKit,YuanZhu-apple/ResearchKit