Homogenize the topics conf variable on templates

In several templates the variable topics is configured
between simple quotes.
It is better to remove them to use the openstack default value.

Change-Id: I418c714240b38b2853a5c746203eac31588e841a

ansible/roles/heat/templates/heat.conf.j2

@@ -79,7 +79,7 @@ auth_uri = {{ internal_protocol }}://{{ kolla_internal_fqdn }}:{{ keystone_publi
 transport_url = {{ notify_transport_url }}
 {% if enable_ceilometer | bool %}
 driver = messagingv2
-topics = 'notifications'
+topics = notifications
 {% else %}
 driver = noop
 {% endif %}

ansible/roles/magnum/templates/magnum.conf.j2

@@ -88,7 +88,7 @@ cert_manager_type = x509keypair
 transport_url = {{ notify_transport_url }}
 {% if enable_ceilometer | bool %}
 driver = messaging
-topics = 'notifications'
+topics = notifications
 {% else %}
 driver = noop
 {% endif %}

ansible/roles/sahara/templates/sahara.conf.j2

@@ -44,7 +44,7 @@ auth_type = password
 transport_url = {{ notify_transport_url }}
 {% if enable_ceilometer | bool %}
 driver = messagingv2
-topics = 'notifications'
+topics = notifications
 {% else %}
 driver = noop
 {% endif %}

ansible/roles/senlin/templates/senlin.conf.j2

@@ -47,7 +47,7 @@ memcached_servers = {% for host in groups['memcached'] %}{{ hostvars[host]['ansi
 transport_url = {{ notify_transport_url }}
 {% if enable_ceilometer | bool %}
 driver = messagingv2
-topics = 'notifications'
+topics = notifications
 {% else %}
 driver = noop
 {% endif %}

ansible/roles/trove/templates/trove-taskmanager.conf.j2

@@ -28,7 +28,7 @@ max_retries = -1
 transport_url = {{ notify_transport_url }}
 {% if enable_ceilometer | bool %}
 driver = messagingv2
-topics = 'notifications'
+topics = notifications
 {% else %}
 driver = noop
 {% endif %}

ansible/roles/trove/templates/trove.conf.j2

@@ -41,7 +41,7 @@ auth_type = password
 transport_url = {{ notify_transport_url }}
 {% if enable_ceilometer | bool %}
 driver = messagingv2
-topics = 'notifications'
+topics = notifications
 {% else %}
 driver = noop
 {% endif %}