fixing get_roles unit test

fix test ldap content

adding ldap groups to test group management

removing crapy configuration file

list of roles and not a uniq role for get_groups

reverse because no effect + disable ssl unit test on travis

fix decorator to disable check on travis

adding unit test for starttls

fix path to ca

reenable ssl no cert check

fix configuration of unit test

test with ldap and not ldaps

test for travis

more logs

greater timeout

trying to fix /etc/hosts

fix /etc/hosts for test env

fix unit test and fix the way ldap connexion options are handled

adding test for add/delete groups

small reorganization

fix and add unit tests on ldap backend

fix search display ...

* fix attritues handling, not using backend attribute name but key given
  in attributes.yml

fix unit tests + add graph method ...

* fix unit tests on roles (adding mandatory description)
* adding a method to get roles graph in json

implementing a method to get groups to remove ...

* implement a way to remove roles from a user
  without removing groups of roles the user keeps

adding unit tests

simplify roles configuration (backend groups)

better default configuration and content in test ldap

implementing weight and normalizing each kind of attributes

implement search

adding key handling