bnc#836363 - applying xen proposal fails after moving away from kvm
bnc#836372 - can not switch compute nodes from xen to kvm
only require certificate files for controllers (bnc#851514)
Merge pull request #256 from jsuchome/release/pebbles/master

bnc#836363 - applying xen proposal fails after moving away from kvm
Merge pull request #285 from jsuchome/cert-files

only require certificate files for controllers (bnc#851514)
Rebased patch

Restart libvirtd after config file changed

When a compute node changes to a new virtualization host,
/etc/libvirtd/qemu.conf is changed, and libvirtd needs to get
restarted to make the change effective. To avoid timing problems,
all packages have to be installed on the system, before the libvirtd
restart check happens

SUSE-internal reference: bnc#829514

Conflicts:
	chef/cookbooks/nova/recipes/compute.rb
Restart libvirtd after config file changed

When a compute node changes to a new virtualization host,
/etc/libvirtd/qemu.conf is changed, and libvirtd needs to get
restarted to make the change effective. To avoid timing problems,
all packages have to be installed on the system, before the libvirtd
restart check happens

SUSE-internal reference: bnc#829514