CA-114498: Linux bonding: set properties (e.g. mode) before adding slaves

This is needed to get LACP bonding to work on the Linux bridge backend.

Signed-off-by: Rob Hoes <rob.hoes@citrix.com>
Merge pull request #28 from robhoes/ea1254

CA-114498: Linux bonding: set properties (e.g. mode) before adding slave...