Force RHEL subscription and allow multiple certs instances

[jordigilh]

• Forces the subscription on the VM using the provided credentials/poolID, even if it has already been subscribed.
• Allows the use case where multiple entitlement files exist in /etc/pki/entitlement. This is the case after I re-subscribed using my own credentials.

  rhsm/certs:
  total 84
  drwxr-xr-x. 2 1000670000 root   138 Nov 30 21:20 .
  drwxr-xr-x. 5 1000670000 root    41 Nov 30 21:21 ..
  -rw-r--r--. 1 1000670000 root  3247 Nov 30 21:20 1666335240653499028-key.pem
  -rw-r--r--. 1 1000670000 root  7717 Nov 30 21:20 1666335240653499028.pem
  -rw-r--r--. 1 1000670000 root  3247 Nov 30 21:19 6861774457071742926-key.pem
  -rw-r--r--. 1 1000670000 root 67859 Nov 30 21:19 6861774457071742926.pem

@sabre1041 @nasx please review.

[jordigilh]

Turns out that I had the wrong pool id in my secret and it was the reason for all my problems.

[jordigilh]

Closing this PR as it is not needed.