Dockerfile.upi.ci: Explicitly use rhel7 for now

[cgwalters]

It looks like the base image switched to RHEL8, but that
lost things like python2 that this image uses. Keep this
code on life support by explicitly using rhel7 for now.

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[cgwalters]

(I didn't test this locally since it has hardcoded references to the api.ci internal rhel mirror - could probably hack that but figured I might as well just try in CI)

[cgwalters]

/retest

[cgwalters]

Oh I think I see, the value in this repo is being overridden by the one in the release repo.

[openshift-ci-robot]

@cgwalters: The following tests failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
ci/prow/images	d7e2647	link	/test images
ci/prow/e2e-metal-ipi	d7e2647	link	/test e2e-metal-ipi
ci/prow/e2e-libvirt	d7e2647	link	/test e2e-libvirt
ci/prow/e2e-ovirt	d7e2647	link	/test e2e-ovirt
ci/prow/e2e-crc	d7e2647	link	/test e2e-crc
ci/prow/e2e-openstack	d7e2647	link	/test e2e-openstack
ci/prow/e2e-aws-upgrade	d7e2647	link	/test e2e-aws-upgrade
ci/prow/e2e-aws-workers-rhel7	d7e2647	link	/test e2e-aws-workers-rhel7
ci/prow/e2e-aws	d7e2647	link	/test e2e-aws
ci/prow/e2e-aws-fips	d7e2647	link	/test e2e-aws-fips

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[wking]

See also #4098

[abhinavdahiya]

See also #4098

maybe this was fixed by that PR, so we can close this. Feel free to re-open if you think that's not the case.

/close

[openshift-ci-robot]

@abhinavdahiya: Closed this PR.

In response to this:

See also #4098

maybe this was fixed by that PR, so we can close this. Feel free to re-open if you think that's not the case.

/close

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