notifier driver configured to deprecated value

[Edward Hope-Morley]

The list_notifier was deprecated a long time ago and should be replaced with the rpc_notifier (as has already been done for the other charms).

./neutron-gateway/templates/icehouse/neutron.conf:notification_driver = neutron.openstack.common.notifier.list_notifier
./neutron-gateway/templates/icehouse/neutron.conf:list_notifier_drivers = neutron.openstack.common.notifier.rabbit_notifier
./neutron-gateway/templates/kilo/neutron.conf:notification_driver = neutron.openstack.common.notifier.list_notifier
./neutron-gateway/templates/kilo/neutron.conf:list_notifier_drivers = neutron.openstack.common.notifier.rabbit_notifier

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/366071

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/366071
Committed: https://git.openstack.org/cgit/openstack/charm-neutron-gateway/commit/?id=279ae9a3ee2a6536e9f416a248ba5d1e46b46534
Submitter: Jenkins
Branch: master

commit 279ae9a3ee2a6536e9f416a248ba5d1e46b46534
Author: Edward Hope-Morley <email address hidden>
Date: Tue Sep 6 12:42:42 2016 +0100

    Use rpc_notifier driver for notifications

    list_notifier was deprecated a very long time ago so
    all versions since Icehouse should use the
    rpc_notifier.

    Also removed unnecessary amulet test that is causing
    race conditions.

    Change-Id: I44a2e6f2cc98f58373eddc50aa0dea268e94c753
    Closes-Bug: 1620564