Allow probe-create to specify device_owner.

The device owner of the probe port can be
specified by the --device-owner option.

There are two values for device-owner option,
network or compute.

The probe port will be created with the network
as the device owner by default.

Fixes: bug #1102726

Change-Id: I72d62e2fe7b8f7a5eb4411bc9052efa82fb4fdf5
Merge "Allow probe-create to specify device_owner."