Fixes an "undefined index" warning on the account settings page

Bug 1311963. The call to get_records_assoc() assumes that institution.name
will be the first column returned. But we've added an institution.id column
that comes before that, so now we need to specifically tell it to use the
name column instead.

Change-Id: I51ef6e805b80894fa6af7bc732fb241adac0fdec