catalog: turn on async bindings by default

Closes #7739

roles/openshift_service_catalog/defaults/main.yml

@@ -1,6 +1,6 @@
 ---
 openshift_service_catalog_remove: false
-openshift_service_catalog_async_bindings_enabled: false
+openshift_service_catalog_async_bindings_enabled: true
 
 openshift_use_openshift_sdn: True
 # os_sdn_network_plugin_name: "{% if openshift_use_openshift_sdn %}redhat/openshift-ovs-subnet{% else %}{% endif %}"