Install qemu-kvm package on centos/fedora

Change I79a8d8ac7ad2fbd7d2fce696821d130218e43e03 removed the install
of python-libguestfs, which was actually hiding a dependency issue on
Centos.  The "kvm" package is ultimately missing some bios files from
"seabios-bin" -- however with python-libguestfs installed this was
coming in via a dependency chain that pulled in qemu-kvm, which has
the dependency.

qemu-kvm is not strictly required as all the functionality is within
qemu-system-x86.  But while we get [1] sorted out this restores the
job functionality.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1235890

Change-Id: I3379bc497978befac48c5af0f1035b96d030b7eb

files/rpms/nova

@@ -10,6 +10,7 @@ iptables
 iputils
 kpartx
 kvm # NOPRIME
+qemu-kvm # NOPRIME
 libvirt-bin # NOPRIME
 libvirt-devel # NOPRIME
 libvirt-python # NOPRIME

lib/nova_plugins/functions-libvirt

@@ -34,6 +34,13 @@ function install_libvirt {
         #pip_install_gr <there-si-no-guestfs-in-pypi>
     elif is_fedora || is_suse; then
         install_package kvm
+        # there is a dependency issue with kvm (which is really just a
+        # wrapper to qemu-system-x86) that leaves some bios files out,
+        # so install qemu-kvm (which shouldn't strictly be needed, as
+        # everything has been merged into qemu-system-x86) to bring in
+        # the right packages. see
+        # https://bugzilla.redhat.com/show_bug.cgi?id=1235890
+        install_package qemu-kvm
         install_package libvirt libvirt-devel
         pip_install_gr libvirt-python
     fi