Added/modified following gate checks to the matrix and added
deployment rating by cross validating it with feature support
matrix[1] and tempest tests.
1.libvirt+kvm (x86 & ppc64)
2.libvirt+kvm (s390x)
3.libvirt+virtuozzo CT
4.libvirt+virtuozzo VM
[1]http://docs.openstack.org/developer/nova/support-matrix.html
Change-Id: I99377ba399ce43151e9fbc525b9afcbc488bba36
Implements: blueprint feature-classification-ocata