Resolve "LDAP connector"

This merge request allows to configure smasch in a way that authentication is done via LDAP.

However, due to the fact that data stored in smasch is very sensitive, LDAP authentication is supported only for users that already exist in smasch (they will not be created automatically). Moreover worker flag ldap_user must be set to True.

To configure ldap there are two parameters that must be added to local_settings.py:

AUTH_LDAP_SERVER_URI = "ldap://lcsb-cdc-lums-01.uni.lu"
AUTH_LDAP_BASE_DN = "cn=users,cn=accounts,dc=uni,dc=lu"

By default LDAP connection is disabled.

Closes #380 (closed)

smash/web/tests/test_ldap_auth.py

@@ -3,17 +3,17 @@ import logging
 import sys
 
 import ldap
-from ldap.cidict import cidict
 from django.test import Client
 from django.test import TestCase
+from django.test.utils import override_settings
 from django_auth_ldap.config import LDAPSearch
 from fakeldap import MockLDAP
+from ldap.cidict import cidict
 from mock import patch
 
 from smash.settings import AUTH_LDAP_BASE_DN, AUTH_LDAP_FILTER
 from web.models import Worker
 from web.tests.functions import create_user
-from django.test.utils import override_settings
 
 logger = logging.getLogger(__name__)