Fix race conditions after login redirect
Essentialy /api/auth/login response has been changed to return
the same result as /api/auth/info. Meaning there's no need to call
/api/auth/info after login. So, all pages that depend on this info
do not have to call or wait for /api/auth/info response.
Therefore it should be also faster.
Test Plan: ./phpunit
Reviewers: #hkccp_developers, vanmeeuwen
Reviewed By: #hkccp_developers, vanmeeuwen
Differential Revision: https://git.kolab.org/D1696