Ideally all elements would be using package-installs so we only
call yum once per stage, but since a lot of these elements are no
longer used this change focuses on just the elements doing one-off
package installs that I found in the undercloud install logs.
A follow-up change would be to do the same kind of audit for the
overcloud image build and fix up all of those elements.
Change-Id: Ie204c5d0aa0f48d3d93d834b51a644d8562cd2fd
Split out the openvswitch installation from the neutron element.
Don't install openvswitch dkms modules in kernel >= 3.12
Openvswitch GRE and VXLAN capabilities are now included in
vanilla kernels (GRE tunneling support in 3.11 and VXLAN in
3.12) so there is no need to install the dkms packages to activate
them. When installing the datapath package, dkms will fail at
compile time with an unsupported kernel version message.
Change-Id: Id456cfb1a0634f43617c23ac82fc4445a58ddb2c
Partial-bug: #1316985
Ghanshyam Mann