Use session for neutron client

python-openstack client is now using sessions to create clients. This
patch implements creating Network client using sessions.

Related to c3c6edb

Change-Id: If90ac705eb11dfc1e3abbe2ce18c3d8ccefdbdfb
Closes-Bug: 1411179

Author: yottatsa

openstackclient/network/client.py

@@ -34,21 +34,9 @@ def make_client(instance):
         API_VERSIONS)
     LOG.debug('Instantiating network client: %s', network_client)
 
-    endpoint = instance.get_endpoint_for_service_type(
-        API_NAME,
-        region_name=instance._region_name,
-    )
-
     return network_client(
-        username=instance._username,
-        tenant_name=instance._project_name,
-        password=instance._password,
+        session=instance.session,
         region_name=instance._region_name,
-        auth_url=instance._auth_url,
-        endpoint_url=endpoint,
-        token=instance.auth.get_token(instance.session),
-        insecure=instance._insecure,
-        ca_cert=instance._cacert,
     )