Removed useless "when"
Removed useless "when"

With | default({}) in our with items, the task will be skipped if
the the variable is undefined. No need for a when.

Change-Id: Ie896084646a7393b92a8f9b3372510eb754dd35d

os-cloud/openstack-ansible-lxc_container_create,os-cloud/openstack-ansible-lxc_container_create,Logan2211/openstack-ansible-lxc_container_create,openstack/openstack-ansible-lxc_container_create,Logan2211/openstack-ansible-lxc_container_create,openstack/openstack-ansible-lxc_container_create