Confirm container data destroys
Confirm container data destroys

Currently running the lxc-containers-destroy playbook will, when
agreed to, destroy all containers and container data across the
entire deployment.

This patch separates the removal of the container from the removal
of the data and includes a prompt to the user to confirm each
option.

The option can be pre-answered through the use of the boolean
variable 'force_containers_data_destroy'.

Change-Id: I70c4819dbe6fc996dd780f205f3e08c300f18591

cloudnull/os-ansible-deployment,weezer/openstack-ansible,robb-romans/openstack-ansible,yanyao/newton,weezer/openstack-ansible,os-cloud/os-ansible-deployment,yanyao/newton,BjoernT/os-ansible-deployment,bunchc/openstack-ansible,stackforge/os-ansible-deployment,openstack/openstack-ansible,yanyao/openstack-ansible,robb-romans/openstack-ansible,BjoernT/os-ansible-deployment,os-cloud/os-ansible-deployment,cfarquhar/openstack-ansible,cloudnull/os-ansible-deployment,bunchc/openstack-ansible,openstack/openstack-ansible,stackforge/os-ansible-deployment,Logan2211/openstack-ansible,BjoernT/openstack-ansible,BjoernT/os-ansible-deployment,yanyao/openstack-ansible,Logan2211/openstack-ansible,BjoernT/openstack-ansible,cfarquhar/openstack-ansible