Kolla-ansible install python docker library in role/baremetal
to group/baremetal, because of this get container facts
for timesync checks is failing on deployment host.

This patch adding when conditional, so deployment host
will be skipped as there is no need to run timesync
checks.

Closes-Bug: #1933347
Change-Id: Ifefb9c74ee6a80cdbc458992d0196850ddfe7ffa