reverted API for VecMultiVec
reverted API for VecMultiVec

huahbo/IBAMR,yaojieuh/IBAMR,yaojieuh/IBAMR,iamciera/IBAMR,yaojieuh/IBAMR,yaojieuh/IBAMR,iamciera/IBAMR,huahbo/IBAMR,yaojieuh/IBAMR,huahbo/IBAMR,iamciera/IBAMR,iamciera/IBAMR,iamciera/IBAMR,huahbo/IBAMR,huahbo/IBAMR,huahbo/IBAMR,huahbo/IBAMR,iamciera/IBAMR,yaojieuh/IBAMR,yaojieuh/IBAMR,iamciera/IBAMR