Only pass distinct services to enabled_services list

The list that was passed contained repeated services, which was
problematic if we wanted to use this list in puppet. So instead we pass
a list with the unique names.

Change-Id: Ib5eb0c5b59a9a50344d22c258ca461e8f1e52c86

puppet/all-nodes-config.yaml

@@ -116,7 +116,10 @@ resources:
            map_merge:
               - tripleo::profile::base::logging::fluentd::fluentd_sources: {get_param: logging_sources}
               - tripleo::profile::base::logging::fluentd::fluentd_groups: {get_param: logging_groups}
-              - enabled_services: {get_param: enabled_services}
+              - enabled_services:
+                  yaql:
+                    expression: $.data.distinct()
+                    data: {get_param: enabled_services}
               # This writes out a mapping of service_name_enabled: 'true'
               # For any services not enabled, hiera foo_enabled will
               # return nil, as it's undefined