Drop templates and settings specific to LAL.
Rearrange platform-dependent templates.

Use SL63 as a model and drop the F14 templates.  We'll follow the Yum
model, so we don't need so much platform-dependent code.
Remove RPM lists

Not needed in the Yum-based templates.
Make ONED and DHCP packages float.
Drop ncm-cloudauthn and let stratuslab packages float
Remove ISCSI stuff from the ONE host
Support NFS in the PDISK sections
Make the mount point a conditional assigment
Create the HOME dir for oneadmin on the frontend.
Make NFS optional in pdisk
Remove ISCSI stuff from the PDISK
Let pdisk packages float
Set the boot nic as the private netwwork
Refactor the libvirt declarations
Set the proxy_sections to a valid value
Declare the KVM-related packages in their own template
Parametrize the interface belonging to the bridge
Use a consistent parameter for private network interface.
Move cloud templates into stratuslab namespace and generic ones into common