mac_oui test silently fails

[grafnu]

as per this failed run, the mac_out test sometimes fails:

==> inst/run-port-02/nodes/macoui02/activate.log <==
Using the host hardware address 3c:5a:b4:1e:8f:0b

With no descriptive error message.

A successful run, looks like:

==> inst/run-port-02/nodes/macoui02/activate.log <==
Using the host hardware address 3c:5a:b4:1e:8f:0b
Main Started...
Reading local file...
Starting connection.mac_oui test...
3C5AB4
3C5AB4 Google