Bug: cepci exposes CDN credentials in console log when running subscirption-manager register

[dahorak]

Describe the bug

cephci exposes CDN credentials into the console log, when running subscirption-manager register .... command:

(cephci.install_prereq) [INFO] - cephci.cephci.ceph.ceph.py:1570 - Execute subscription-manager register --username USERNAME --password EXPOSED_PASSWORD --serverurl subscription.rhsm.redhat.com:443 --baseurl https://cdn.redhat.com --force on IP
(cephci.install_prereq) [DEBUG] - cephci.cephci.ceph.ceph.py:1184 - Registering to: subscription.rhsm.redhat.com:443/subscription
(cephci.install_prereq) [DEBUG] - cephci.cephci.ceph.ceph.py:1184 - The system has been registered with ID: 0a4f3447-bdf1-4ceb-b784-bfa90af1b132
(cephci.install_prereq) [DEBUG] - cephci.cephci.ceph.ceph.py:1184 - The registered system name is: osd-3.srozen9-msc-bz-external.qe.rh-ocs.com
(cephci.install_prereq) [INFO] - cephci.cephci.ceph.ceph.py:1600 - Execution of subscription-manager register --username USERNAME --password EXPOSED_PASSWORD --serverurl subscription.rhsm.redhat.com:443 --baseurl https://cdn.redhat.com --force on IP took 9.010615 seconds.
(cephci.install_prereq) [INFO] - cephci.cephci.tests.misc_env.install_prereq.py:273 - Subscribed to cdn server successfully

To Reproduce
Run Ceph deployment via cephci and search for subscription-manager register command in the console log.

python run.py --cloud baremetal --rhbuild 8.0 --platform rhel-9 --cluster-conf clusters.conf --suite suites/reef/integrations/ocs_rgw_without_ssl_vsphere.yaml --build rc --skip-sos-report --log-level DEBUG --log-dir ceph-ci-logs

Expected behavior
No credentials should be exposed to the console log.