rhsm: Composer container doesn't look at host-entitlement

[croissanne]

     -v /etc/rhsm:/etc/rhsm:Z \
     -v /etc/pki/entitlement:/etc/pki/entitlement:Z \

shouldn't be necessary. We should also check /etc/pki/entitlement-host and /etc/rhsm-host for secrets.

[teg]

Hmm, with depsolving in the workers, do we need this at all?

[croissanne]

Nah, it just breaks the regression tests a little. See #1842. This isn't urgent.

[croissanne]

In fact we might not want this as this might be the only way to do cross-rhel version building (in a container which can have a different subscription).