fuel_plugin: Working version on Montreal POD

- change libvirt on controller to 1.2.12
- change qemu on controller to 2.2.1
- work around _set_device_mtu issue
- remove existing OVS neutron plugin
- fixes to puppet resource ordering
- numerous other smaller changes

Change-Id: I9a7c66065013a43f5e88871ef8b9f1cdd1038245
Signed-off-by: Mark D. Gray <mark.d.gray@intel.com>
Signed-off-by: Billy O'Mahony <billy.o.mahony@intel.com>
Signed-off-by: Michal Ptacek <michalx.ptacek@intel.com>