Original_request_url is not present after upgrading to Agent 5

Bug description

In Agent 4 custom logins in the referrer field original_request_url provided the information to the custom ui piece.

How to reproduce the issue

Set up a custom login

1. deploy custom login url to apache http
2. configure it
3. Add CDSSO domains as needed to match cookie being set.
4. set the custom login flag to true - org.forgerock.openam.agents.config.allow.custom.login=true
5. set login to http://agent.alextest.com:8080/login.html
6. set NEU for login.html* (I also have ? and plain login.html, but the login.html* was pivotal/
7. turn on stateless signing & deflation
8. set a policy as needed
9. Hit index.html and authenticate.

Expected behaviour

original_request_url is present in har file after authentication on original url

Current behaviour

original_request_url is not present in har file after authentication on original url

Work around

OPTIONAL - If you have a workaround, please put the details here (remove this text)

Code analysis

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