Answer the upgrade no-going-back prompt
Answer the upgrade no-going-back prompt

For automated upgrade checks we need to ensure that the prompt
is answered, otherwise the upgrade will not go ahead.

Change-Id: I32e2b4554ef2fcf3fa2a8dead1ab5321fb392519

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