add socket volume

[LAB stack@undercloud tripleo-heat-templates]$ git diff
diff --git a/openstack-tripleo-heat-templates/docker/services/haproxy.yaml b/openstack-tripleo-heat-templates/docker/services/haproxy.yaml
index ca03f2c..6da6a7f 100644
--- a/openstack-tripleo-heat-templates/docker/services/haproxy.yaml
+++ b/openstack-tripleo-heat-templates/docker/services/haproxy.yaml
@@ -193,6 +193,8 @@ outputs:
                 -
                   - /var/lib/kolla/config_files/haproxy.json:/var/lib/kolla/config_files/config.json:ro
                   - /var/lib/config-data/puppet-generated/haproxy/:/var/lib/kolla/config_files/src:ro
+                  # in order to get access to the socket
+                  - /var/lib/haproxy/:/var/lib/haproxy/:rw
                   - list_join:
                     - ':'
                     - - {get_param: DeployedSSLCertificatePath}
diff --git a/openstack-tripleo-heat-templates/docker/services/pacemaker/haproxy.yaml b/openstack-tripleo-heat-templates/docker/services/pacemaker/haproxy.yaml
index 430c634..2cde26a 100644
--- a/openstack-tripleo-heat-templates/docker/services/pacemaker/haproxy.yaml
+++ b/openstack-tripleo-heat-templates/docker/services/pacemaker/haproxy.yaml
@@ -217,6 +217,8 @@ outputs:
                   - /usr/libexec/initscripts/legacy-actions:/usr/libexec/initscripts/legacy-actions:ro
                   - /etc/corosync/corosync.conf:/etc/corosync/corosync.conf:ro
                   - /dev/shm:/dev/shm:rw
+                  # in order to get access to the socket
+                  - /var/lib/haproxy/:/var/lib/haproxy/:rw
       metadata_settings:
         get_attr: [HAProxyBase, role_data, metadata_settings]
       upgrade_tasks: