Remove duplicate fos_user_xxx routes

Kristian B reported the following problem to sonata-users group:
There are both fos_user_xxx and sonata_user_xxx routes with the same paths.
UPDATE  fos_user_security_login                         /login
UPDATE  sonata_user_security_login                   /login
When trying to edit one of these pages, the following error happen: The URL '/login' is already associated with another page.

I removed duplicate routes in Resources/config/routing/*.xml files and changed references to fos_user_xxx routes to use sonata_user_xxx routes.