To ensure that we have some basic data for custom profile settings,
in the `populate_db` data set, remove `options['test_suite']` check
for adding intial custom profile data.
The example_user() function is specifically designed for
AARON, hamlet, cordelia, and friends, and it allows a concise
way of using their built-in user profiles. Eventually, the
widespread use of example_user() should help us with refactorings
such as moving the tests users out of the "zulip.com" realm
and deprecating get_user_profile_by_email.