Horizon: Enable c-bak panel

... when cinder-backup is enabled.

The service is not automatically discovered and the availability should
be declared by the OPENSTACK_CINDER_FEATURES option.

Change-Id: Ieba9b30b6ef32b021a1d04a616b836d2a480f9a1

fixtures/scenario002.pp

@@ -97,6 +97,7 @@ class { 'openstack_integration::gnocchi':
 
 class { 'openstack_integration::horizon':
   cache_backend         => $django_cache_backend,
+  cinder_backup_enabled => true,
   ironic_enabled        => true
 }
 

manifests/horizon.pp

@@ -4,6 +4,10 @@
 #  (optional) The django cache backend
 #  Defaults to 'memcached'.
 #
+# [*cinder_backup_enabled*]
+#  (optional) Flag to enable cinder-backup panel.
+#  Defaults to false
+#
 # [*heat_enabled*]
 #  (optional) Flag to enable heat dashboard
 #  Defaults to false.
@@ -22,6 +26,7 @@
 #
 class openstack_integration::horizon (
   $cache_backend         = 'memcached',
+  $cinder_backup_enabled = false,
   $heat_enabled          = false,
   $manila_enabled        = false,
   $ironic_enabled        = false,
@@ -76,6 +81,9 @@ class openstack_integration::horizon (
     wsgi_processes                 => 2,
     keystone_url                   => $::openstack_integration::config::keystone_auth_uri,
     log_level                      => 'DEBUG',
+    cinder_options                 => {
+      'enable_backup' => $cinder_backup_enabled
+    },
   }
 
   # TODO(tkajinam) Debian/Ubuntu package does not install the policy files