Allow url map to handle backend service fields that can also be backend buckets. (#4269) (#590)
Allow url map to handle backend service fields that can also be backend buckets. (#4269) (#590)

* undo the removal of the resourcerefs, write a function specifically for backend refs.

* Add test with bucket, add comment.

Signed-off-by: Modular Magician <86ce7da8ad74b1c583667a2bebd347455fa06219@google.com>
GoogleCloudPlatform/terraform-google-conversion