[fix] avoid random bug on post-install due to nscd cache\n\nThanks to…

… the work of Alex Aubin who've managed to discover why this was happening and propose a solution.

src/yunohost/tools.py

@@ -32,6 +32,7 @@
 import json
 import errno
 import logging
+import subprocess
 from collections import OrderedDict
 
 import apt
@@ -82,6 +83,7 @@ def tools_ldapinit(auth):
     }
 
     auth.update('cn=admin', admin_dict)
+    subprocess.call(['nscd', '-i', 'passwd'])
 
     logger.success(m18n.n('ldap_initialized'))