added case to cover map, routes for custom domain

add debug logs for delete method

Change-Id: I902c49f3c988a525a42cfe22a9ed2315532cf808
Signed-off-by: Pin Xie <pxie@vmware.com>
Reviewed-on: http://reviews.cloudfoundry.org/13087
Tested-by: CI Master <cf-ci@rbcon.com>
Reviewed-by: Jing Gong <jgong@rbcon.com>