Drop deprecated keystone::client

The class was used to install the keystoneclient package but
the package no longer provides CLI.

The openstackclient package is now installed by the keystone class,
using the openstacklib::openstackclient class included, so we no longer
have to include that deprecate class.

Change-Id: I0085beb0487ecc25bcc29fdc1f7b2521ca67b61e

manifests/keystone.pp

@@ -38,7 +38,6 @@ class openstack_integration::keystone (
     Exec['update-ca-certificates'] ~> Service['httpd']
   }
 
-  class { 'keystone::client': }
   class { 'keystone::cron::fernet_rotate':
     hour   => '*',
     minute => '*/30',