improve logging of network operations

We're not necessarily waiting "for the net to come back", because
we may not have changed anything in the network config.  But if
we have, then we should explicitly log it.
Merge pull request #281 from aspiers/better-logs

improve logging of network operations
Unbreak install-chef(-suse).sh

"provisioner" might be nil. As during installation the admin node does not have
the provisioner-server role assigned (yet) when the network recipe is executed.
Merge pull request #282 from rhafer/unbreak-install

Unbreak install-chef(-suse).sh