Use version 3 of the yum cookbook

The 3rd verison of the yum cookbook introduces breaking changes,
so all cookbooks that use it need to be modified.

blueprint yum-cookbook-v3-support

Change-Id: I65f8d3f49816805b0a2d04ef84432b4facc5eb2a
Merge "Use version 3 of the yum cookbook"
rename tests for SLES instead of openSUSE

Change-Id: I0c9a86af2ba8e4b7995b96d96870726a07871273
Make nova-compute-{kvm,qemu} packages overridable

To keep the "we define platform choices in the attributes" spirit, the
nova-compute "support packages" for ubuntu should be overridable, too.

This change makes them behave just like  to the
"#{db_type}_python_packages" in openstack-compute::nova-common.

Change-Id: Id38169121e52e0dc8be808c8822db55069e65e48
Merge "Make nova-compute-{kvm,qemu} packages overridable"