Fix bug causing Expire Runs to fail.
Fix bug causing Expire Runs to fail.

Fixes a bug where any run that had a user without an email associated to their account to stop the Expire Runs task from completing successfully.  
terranodo/eventkit-cloud,terranodo/eventkit-cloud,venicegeo/eventkit-cloud,venicegeo/eventkit-cloud,terranodo/eventkit-cloud,venicegeo/eventkit-cloud,venicegeo/eventkit-cloud,venicegeo/eventkit-cloud,venicegeo/eventkit-cloud,terranodo/eventkit-cloud