Tests the overriden referer headers are properly reported and applied with interception
*Not* overriding referer in interception handler:
referer in requestWillBeSent: https://127.0.0.1:8000/
referer in requestIntercepted: https://127.0.0.1:8000/
response: HTTP_REFERER: https://127.0.0.1:8000/

Overriding referer in interception handler:
referer in requestWillBeSent: https://127.0.0.1:8000/
referer in requestIntercepted: https://127.0.0.1:8000/
response: HTTP_REFERER: http://localhost:8000/