I-132651 500 error on challenges rss

@ykohata Can you verify that adding this back this won't break anything? I think it was just removed as part of a bad merge and it's causing https://appirio.my.salesforce.com/a3v50000000CvaK so if we release Thursday as is it will cause (at least) all RSS calls to fail.

I think it will need to go into the release branch for Thursday?