Enable checks for haproxy glance_registry_api

https://github.com/Mirantis/mk-lab-salt-model/pull/154
diff --git a/haproxy/proxy/listen/openstack/glance.yml b/haproxy/proxy/listen/openstack/glance.yml
index d8795c3..729cc5b 100644
--- a/haproxy/proxy/listen/openstack/glance.yml
+++ b/haproxy/proxy/listen/openstack/glance.yml
@@ -24,7 +24,6 @@
         glance_registry_api:
           type: general-service
           service_name: glance
-          check: false
           binds:
           - address: ${_param:cluster_vip_address}
             port: 9191