Fixed bug for threads/pair-threads/cores in openstack connector. New...

Fixed bug for threads/pair-threads/cores in openstack connector. New implementation according to https://specs.openstack.org/openstack/nova-specs/specs/mitaka/implemented/virt-driver-cpu-thread-pinning.html



Signed-off-by: Pablo Montes Moreno <pablo.montesmoreno@telefonica.com>