The versions of libvirt and kvm-qemu are not available in the
Ubuntu Cloud Archive (UCA) liberty anymore.
I bumped the version numbers of them.
Add cleanup of package "software-properties-common"
With commit d126b3f92e we added the pgk "software-properties-common"
to allow the installation of the new repositories.
This is a follow up patch which implements the cleanup of this package
in case the devstack-plugin is used outside of a OpenStack testing
job (for example a test VM of developer who doesn't throw away the
For the "happy path" to makes things work, we use the Ubuntu Cloud
Archives. This repository has to be added. The command to do that
is not available on the gate test nodes .
This change installs a package which brings the command
"add-apt-repository" with it.