This matches the timeout used in linux:
https://linux.die.net/man/5/dhclient.conf
This resolves several issues noticed during testing when we
have a very large number of devices that try to get an IP address
around the same time.
*_packet_pressure_parallel tests are useful for checking for synchronization
errors, but push the practical limitations of the network stack. Failing
these tests is not unreasonable.
*_packet_pressure tests are a little bit less unreasonable, but also
push the practical limitations of the network stack. Hopefully these
will become stable in the near future.
Printing out dropped packets caused significantly more overhead in the
parallel tests due to increased noise on the network. This noise would
push the tests past their provided timeouts.
Christopher Haster