Pass endpoint_type to Sahara client constructor

Currently endpoint_type is not passed to api.client.Client(), so
the default (publicURL) is always applied. This results in useless
--endpoint-type option and SAHARA_ENDPOINT_TYPE variable.

Change-Id: If9f84776bee0dd8d1680418acebafd49ea876967
Closes-Bug: #1417527

saharaclient/shell.py

@@ -641,6 +641,7 @@ class OpenStackSaharaShell(object):
                                 project_name=os_tenant_name,
                                 auth_url=os_auth_url,
                                 sahara_url=bypass_url,
+                                endpoint_type=endpoint_type,
                                 session=keystone_session,
                                 auth=keystone_auth,
                                 cacert=os_cacert,