keystone: Drop override of fernet options

The value used for fernet_key_repository exactly matches the default
value of the parameter.

Also the current setting of fernet_max_active_keys increases max
active keys from default(3) but we have no specific requirement to do
so.

Change-Id: I0d2c36371ddff3741a2bb49d9ce7f18fc85c875e

manifests/keystone.pp

@@ -74,8 +74,6 @@ class openstack_integration::keystone (
     using_domain_config        => $using_domain_config,
     public_endpoint            => $::openstack_integration::config::keystone_auth_uri,
     manage_policyrcd           => true,
-    fernet_key_repository      => '/etc/keystone/fernet-keys/',
-    fernet_max_active_keys     => '5',
     token_expiration           => $token_expiration,
     default_transport_url      => os_transport_url({
       'transport' => $::openstack_integration::config::messaging_default_proto,