Allow same URLs when HTTP auth not the same

[smudge]

/domain @samandmoore @effron
/no-platform

Uncovered another one! We have a case where we want to talk to the same service as two different users. The new "Already stubbed url" exception was blocking this use case because by the time we do the comparison we had already stripped the HTTP auth user/pw out of the URL.

This reworks that one check so that it uses the "full URL" (yeah wasn't sure what to call it) instead of the "service URL" (the one used in the mock, no HTTP auth included).

[nanda-prbot]

Needs somebody from @samandmoore and @effron to claim domain review

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[samandmoore]

ah yea. i forgot about this use-case. seems useful to keep it. thanks for adding a test!

<<domainlgtm

let's just run this through our full app test suites to make sure things are working across the board with this fix.

[nanda-prbot]

Approved! 💥 🙌 🔩