Fix private network for SLES [GH-1962]

**Pull Request**

Fix for SLES 11 private networking.  Basically I just copied over the networking template files from `templates/guests/redhat` and set `BOOTPROTO=static` in `templates/guests/suse/network_static.erb`.

Booted my SLES VM and saw a 192.168.x.x interface in `/sbin/ifconfig` output, as I would expect.