Description of problem:
Docker fails to pull image from Satellite on a RHEL7 host, whereas podman pull succeeds using the same path.

Version-Release number of selected component (if applicable):
6.14.2 snap 3.0

How reproducible:
Always

Steps to Reproduce:
1. Sync a docker repo into Satellite (used library/busybox from gcr.io).
2. From a RHEL7 host run `docker login` and `docker pull <published_at_url>`
or
Use one of these robottelo tests for setup and case run
023f0538-2aad-4f87-b8a8-6ccced648366
2a331f88-406b-4a5c-ae70-302a9994077f

Actual results:
Docker pull fails with this error:
error parsing HTTP 404 response body: invalid character ':' after top-level value: "404: Not Found"
While the same pull from podman succeeds.

Expected results:
Docker pull should succeed too.

DEV Tracker for https://issues.redhat.com/browse/SAT-23074
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2262793