automatically set up SBD disk
ensure that we downloaded crowbar_register

wget can "succeed" without actually downloading crowbar_register, e.g.

==> controller2: --2014-05-12 22:34:44--  (try: 4)  http://192.168.124.10:8091/suse-11.3/crowbar_register
==> controller2: Connecting to 192.168.124.10:8091...
==> controller2: failed: Connection timed out.
==> controller2: Retrying.
==> controller2: --2014-05-12 22:37:58--  (try: 5)  http://192.168.124.10:8091/suse-11.3/crowbar_register
==> controller2: Connecting to 192.168.124.10:8091...
==> controller2: failed: Connection refused.
==> controller2: chmod:
==> controller2: cannot access `crowbar_register'
==> controller2: : No such file or directory
==> controller2: /tmp/vagrant-shell: line 5: ./crowbar_register: No such file or directory
add set -e to vagrant provision scripts

We don't want any silent failures.
add utility to list MAC addresses

Useful when adding aliases for nodes in Crowbar.
add patch to fix bonding mode setting

https://github.com/crowbar/barclamp-network/pull/286