upgrade: Add upgrade patch to 4.3.0
Add cpu model for kvm guest.Now all the kvm guest's cpu model is 'QEMU Virtual CPU version xxx'. This will affect the activation of Windows OS and low performance. I add three mode for user to indicate the guest cpu model.add libvirt version check

Signed-off-by: Wei Zhou <w.zhou@leaseweb.com>
CLOUDSTACK:3594: Fixes related to affinity groups tests. Included two test suites those were missed because there was no decorator for test cases

Signed-off-by: Prasanna Santhanam <tsp@apache.org>
(cherry picked from commit 3028f4223b2a00f80159b387e86211effcfeda11)