CA-116420: when creating linux bond, add MAC address after adding bond slaves

This is needed under kernel 3.x, because the kernel now changes the bond MAC to
the MAC of the first slave that is added, which is not always what we want.

Signed-off-by: Rob Hoes <rob.hoes@citrix.com>
Merge pull request #18 from robhoes/ea1254

CA-116420: when creating linux bond, add MAC address after adding bond slaves