use new parameters to configure neutron/notifications
use new parameters to configure neutron/notifications

A recent change in puppet-neutron updated parameters to configure
neutron/nova notifcations.

This patch uses the new parameter and avoid warning in Puppet catalog.

Change-Id: Ib83c7778c111e7d038dde5a8c2f03a19864af734

openstack/puppet-openstack-integration,openstack/puppet-openstack-integration,openstack/puppet-openstack-integration