container_update: Retry removing containers.
container_update: Retry removing containers.

Change-Id: Ifd28fd60e4bc1218acc24381d13534c227f2877e
Related-Bug: #1856086
Signed-off-by: Luke Short <75ade22b5a2100772de069dd66aee23213a7adc0@gmail.com>

openstack/tripleo-common,openstack/tripleo-common