LDAP group sync was trying to find users based on the external_auth_id
which is not garunteed to match the username entered so somtimes
the search for a user would fail.
This passes the username to the group sync.
Picked up by @yoyokko in #959.
* Started move to laravel 5.3
* Started updating login & registration flows for laravel 5.3 update
* Updated app emails to notification system
* Fixed registations bugs and removed email confirmation model
* Fixed large portion of laravel post-upgrade issues
* Fixed and tested LDAP process
