fixed bug that was allowing duplicate questions when selecting random
fixed bug that was allowing duplicate questions when selecting random

BYU-Open-Analytics/BYUOpenAssessments,lumenlearning/OpenAssessments,lumenlearning/OpenAssessments,BYU-Open-Analytics/BYUOpenAssessments,lumenlearning/OpenAssessments,atomicjolt/OpenAssessments,atomicjolt/OpenAssessments,BYU-Open-Analytics/BYUOpenAssessments,BYU-Open-Analytics/BYUOpenAssessments,atomicjolt/OpenAssessments,atomicjolt/OpenAssessments,lumenlearning/OpenAssessments