During major upgrade, ensure that the haproxy bundle exposes
the HAProxy stats socket by ensuring there is a bind mount of
/var/lib/haproxy from the host.
Also create /var/lib/haproxy on the host with host_prep_tasks,
and make sure that permissions will be set by Kolla init
at next container restarts.
Depends-On: Ib833ebe16fcc1356c9e0fc23a7eebe9c4b970c55
Change-Id: I0923375fef9f392d3692afb50b21fee7b57c3ca0
d21bf1865a