fix test configurations to take into account mandatory params for Active Directory

fix unit tests

adding check function to validate attributes type

adding check for reserved password keys

adding unit test for ppolicy

disable ssl in test configuration

fix test configuration

adding various unit tests

fix configuration of unit test

test with ldap and not ldaps

fix unit tests + add graph method ...

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

adding unit tests

simplify roles configuration (backend groups)

implementing weight and normalizing each kind of attributes

adding key and fixing unit tests

fix test configuration

fix configuration

adding methods add_user and del_user ...

* adding add_user
* adding del_user
* adding unit tests
* adding configuration parameters for adding users

adding objectclasses options

implementing search users ...

* adding search
* adding unit tests

adding search template

multiple changes ...

* implemeting recover user attributes
* adding a unit test for unavailable ldap
* adding a parameter timeout to set the ldap timeout connexion

many fixes in unit tests + fix in params + fix in constant ...

Oh god, python-ldap is crap...
* add better unit test
* correct params name
* correct exception handling
* disable testConnectSSLNoCheck (impossible to test with a certificate
  previously defined)

multiple changes ...

* change parameters name for Backend Ldap
* fix default value handling in backends get_param
* correct exception in backends get_param
* fix syntaxe error
* add backend name in test_BackendLdap.py

fix backend name

implementing loading backends ...

* fix conf file
* add exceptions
* fix modules skeletons

set log level to debug for test configuration

adding loading roles and attributes

begin implementation of the main application

change backend key name in attributes + methods ...

* adding get_backends
* adding get_selfattributes (attributes users can change themselves)
* adding unit tests
* rename backend-attributes -> bakends (for homogeneity with role.yml)