For the latest qemu-kvm, you have to use the qemu-kvm-ev package,
which is based off the qemu-kvm-rhev package, which is explained in
[1] but you probably can't read it. The gist is, that qemu-kvm-rhev
is a later build of kvm that is incompatible with the base version
provided. qemu-kvm-rhev is only provided with the RHV (ovirt) and
RHOS (openstack) products. CentOS rebuilds this package as
qemu-kvm-ev as part of it's virtualisation SIG.
I9a972e3fde2e4e552f6fc98350820c07873c3de3 has bumped up the minimum
qemu version to 2.1.0. It seems there is a an issue (bug #1668164)
where having the qemu-system package installed gets picked up if
installed, and reports the incorrect version to nova, causing failure.
This removes the installs from files/rpms/nova as it is all being done
in function-libvirt. We only install the qemu-kvm-ev package on
centos and remove the old work-around.
[1] https://access.redhat.com/solutions/629513
[2] https://wiki.centos.org/SpecialInterestGroup/Virtualization
Change-Id: Ide91b261f35fb19d8bd7155ca016fa3b76a45ea1