Handle abandoning a nic when the network barclamp takes over a system. [3/4]

The network barclamp now properly handles the scenario where we
abandon the interface we initially PXE booted and installed from, and
the default smoketest now tests that configuration.


 chef/cookbooks/network/recipes/default.rb |   31 ++++++++++++++++++++++++-----
 1 file changed, 26 insertions(+), 5 deletions(-)

Crowbar-Pull-ID: dd3666f0c95a7d5b43e788a8e2c8b5d2e1e2e7bd

Crowbar-Release: pebbles