clear white space in instance guid
clear white space in instance guid

so that fake emails won't be invalid

atomicjolt/OpenAssessments,atomicjolt/OpenAssessments,atomicjolt/OpenAssessments,lumenlearning/OpenAssessments,lumenlearning/OpenAssessments,lumenlearning/OpenAssessments,lumenlearning/OpenAssessments,atomicjolt/OpenAssessments