Login via user before creation

If ldap is enabled we have to login via user in gerrit
before managing gerrit account, so ldap entry will be
properly linked to gerrit user database.

Change-Id: I2d8d917dd5f129ec4b3c32db3a490b8c656d5a01
Related-prod: #PROD-29665 (PROD:29665)
diff --git a/README.rst b/README.rst
index a4c93d5..536a4d5 100644
--- a/README.rst
+++ b/README.rst
@@ -118,7 +118,8 @@
             description: admin 02
 
 
-Gerrit client enforcing users, install using pip
+Gerrit client enforcing users, install using pip. If gerrit is configured with LDAP
+it is required to set http_password as ldap user password to properly link ldap entry with gerrit account.
 
 .. code-block:: yaml