Doc: Notice to disable security hardening role during minor upgrades
Doc: Notice to disable security hardening role during minor upgrades

Change-Id: I9d6adbe293543f953b0fd8b94b94cf21e914cc0b
Closes-Bug: #1568029

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