Fixed the upgrade script edge case
Fixed the upgrade script edge case

Changed the command to find the containers to only look for the contianer
config file within a given directory and to only look one level deep.
This change is in response to an issue that can happen if the container
directory "/var/lib/lxc" is also a mounted file system.

Change-Id: Id39995580900e2b9d9a35435d0cfeba82075d62b
Closes-Bug: #1470571

mancdaz/openstack-ansible,jpmontez/openstack-ansible,yanyao/newton,git-harry/os-ansible-deployment,cloudnull/os-ansible-deployment,shane-c/openstack-ansible,antonym/openstack-ansible,open-switch/infra_openstack-ansible,yanyao/openstack-deployment-liberty,major/openstack-ansible,cfarquhar/openstack-ansible,yanyao/newton,dhanunjaya/os-ansible-deployment,git-harry/os-ansible-deployment,BjoernT/os-ansible-deployment,sigmavirus24/openstack-ansible,pombredanne/os-ansible-deployment,dhanunjaya/os-ansible-deployment,pombredanne/os-ansible-deployment,major/os-ansible-deployment,jpmontez/openstack-ansible,mrda/openstack-ansible,BjoernT/openstack-ansible,achekunov/openstack-ansible,robb-romans/openstack-ansible,sacharya/os-ansible-deployment,major/openstack-ansible,shane-c/openstack-ansible,shane-c/openstack-ansible,jpmontez/os-ansible-deployment,mrda/openstack-ansible,mancdaz/openstack-ansible,jpmontez/openstack-ansible,wenhuizhang/os-ansible-deployment,jpmontez/os-ansible-deployment,os-cloud/os-ansible-deployment,Logan2211/openstack-ansible,bunchc/openstack-ansible,yanyao/openstack-ansible,mrda/openstack-ansible,sti-jans/openstack-ansible,yanyao/openstack-ansible,BjoernT/openstack-ansible,manuelfelipe/openstack-ansible,robb-romans/openstack-ansible,pombredanne/os-ansible-deployment,AlphaStaxLLC/os-ansible-deployment,sti-jans/openstack-ansible,wenhuizhang/os-ansible-deployment,stackforge/os-ansible-deployment,yanyao/openstack-deployment-liberty,cfarquhar/openstack-ansible,os-cloud/os-ansible-deployment,major/os-ansible-deployment,antonym/openstack-ansible,yanyao/openstack-deployment-liberty,sacharya/os-ansible-deployment,weezer/openstack-ansible,AlphaStaxLLC/os-ansible-deployment,cloudnull/os-ansible-deployment,open-switch/infra_openstack-ansible,sigmavirus24/os-ansible-deployment,miguelgrinberg/os-ansible-deployment,openstack/openstack-ansible,achekunov/openstack-ansible,bunchc/openstack-ansible,sigmavirus24/openstack-ansible,git-harry/os-ansible-deployment,miguelgrinberg/os-ansible-deployment,open-switch/infra_openstack-ansible,BjoernT/os-ansible-deployment,sti-jans/openstack-ansible,openstack/openstack-ansible,manuelfelipe/openstack-ansible,antonym/openstack-ansible,Logan2211/openstack-ansible,sigmavirus24/os-ansible-deployment,achekunov/openstack-ansible,stackforge/os-ansible-deployment,BjoernT/os-ansible-deployment,weezer/openstack-ansible,AlphaStaxLLC/os-ansible-deployment,jpmontez/os-ansible-deployment,manuelfelipe/openstack-ansible