[Bug 1758989] Re: rt 110013: Tunnel connection failed: 403 Forbidden

[Lukas Märdian]

It seems to affect some more packages/autopkgtests:
```
ubuntu-archive-tools/retry-autopkgtest-regressions --log-regex "Tunnel connection failed: 403"
https://autopkgtest.ubuntu.com/request.cgi?release=kinetic&arch=s390x&package=pandas&trigger=python-xarray%2F2022.06.0-1&trigger=pytest-xdist%2F2.5.0-5&trigger=matplotlib%2F3.5.2-2&trigger=lxml%2F4.9.1-1&trigger=pytest%2F7.1.2-2
https://autopkgtest.ubuntu.com/request.cgi?release=kinetic&arch=s390x&package=sphinx-automodapi&trigger=sphinx-automodapi%2F0.14.1-2
https://autopkgtest.ubuntu.com/request.cgi?release=kinetic&arch=s390x&package=pytest-doctestplus&trigger=python-pip%2F22.2%2Bdfsg-1&trigger=pytest%2F7.1.2-2
https://autopkgtest.ubuntu.com/request.cgi?release=kinetic&arch=s390x&package=python-pbr&trigger=python-pip%2F22.2%2Bdfsg-1
https://autopkgtest.ubuntu.com/request.cgi?release=kinetic&arch=s390x&package=python-pip&trigger=python-pip%2F22.2%2Bdfsg-1
https://autopkgtest.ubuntu.com/request.cgi?release=kinetic&arch=s390x&package=python-virtualenv&trigger=python-pip%2F22.2%2Bdfsg-1&trigger=distlib%2F0.3.5-1
https://autopkgtest.ubuntu.com/request.cgi?release=kinetic&arch=s390x&package=xml2rfc&trigger=xml2rfc%2F3.13.1-1&trigger=pypdf2%2F2.6.0-1&trigger=lxml%2F4.9.1-1
https://autopkgtest.ubuntu.com/request.cgi?release=kinetic&arch=arm64&package=sphinx-astropy&trigger=pillow%2F9.2.0-1
https://autopkgtest.ubuntu.com/request.cgi?release=kinetic&arch=ppc64el&package=sphinx-astropy&trigger=pillow%2F9.2.0-1
https://autopkgtest.ubuntu.com/request.cgi?release=kinetic&arch=s390x&package=metakernel&trigger=pytest%2F7.1.2-2
```

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https://bugs.launchpad.net/bugs/1758989

Title:
  rt 110013: Tunnel connection failed: 403 Forbidden

Status in CDO QA System Tests:
  Fix Released
Status in lxml package in Ubuntu:
  New
Status in pandas package in Ubuntu:
  New
Status in xml2rfc package in Ubuntu:
  New

Bug description:
  Tunnel connection failed: 403 Forbidden

  This is an intermittent error. IS has been notified:
  https://rt.admin.canonical.com/Ticket/Display.html?id=110013

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