As we hit cases of deadlock when a sandbox is stuck stopping

Signed-off-by: Peter Hunt <pehunt@redhat.com>

…9188-to-release-1.33

[release-1.33] RFC: sandbox: use created/stopped instead of infra container for readiness

Signed-off-by: Kubernetes Release Robot <k8s-release-robot@users.noreply.github.com>

If `iptables --version` failed, iptables.New() would log a warning
and assume that the problem was that you had an implausibly ancient
version of iptables installed. Change it to instead assume that the
problem is that you don't have iptables installed at all (and only
log at debug).

Signed-off-by: Dan Winship <danwinship@redhat.com>

Add an internal constructor so that the unit tests share the same
logic as the real constructor, and fix it to handle nil sub-managers
correctly.

Signed-off-by: Dan Winship <danwinship@redhat.com>

…9222-to-release-1.33

[release-1.33] Fix HostPort manager when one backend is unavailable

Bump version to 1.33.1