Correct EMWF users to display username_in_report

For a user "John Doe"
The filter originally displayed `jdoe@myproject.commcarehq.org "John Doe" [user]`
It was changed to display just `jdoe [user]`, in what looks like it was meant to strip the `@myproject.commcarehq.org`
This change makes the display the proper username_in_report display used elsewhere: `jdoe "John Doe" [user]`

http://manage.dimagi.com/default.asp?106857