CLOUDSTACK-2121. DOC. New docs for affinity groups.
CLOUDSTACK-4520: [upgrade][vmware]ExtractVolumeCmd fails with NPE while
attempting to download a volume.
CLOUDSTACK-4516:[Upgrade][VMWare]
MySQLIntegrityConstraintViolationException while performing any task
using local storage after upgrade from 3.0.7 to 4.2.
CLOUDSTACK-4459: one more try, bypass libvirt to find volume if libvirt call failed