Attempt to fix exportClass with PII coming up empty, when same class without PII produces data. The issue was for cases in which no entries exist for an anon_screen_name in EdxPrivate.Account. This was true for all EDUC-FACT students, which is why the problem was blatant there. Pushing to try fix on datastage. The fix involved changing the SQL used in makeCourseCSVs.sh.