tests: Fix dnsmasq tests in cases where 8.8.8.8 is assigned via DHCP
tests: Fix dnsmasq tests in cases where 8.8.8.8 is assigned via DHCP

One of the test was making sure we were NOT using the default 8.8.8.8
server even though that may be a valid upstream server provided by DHCP/PPP.

Change-type: patch
Signed-off-by: Kyle Harding <3c25b01657254677d3e1a8fd1f0742c5d489bd39@balena.io>
resin-os/meta-resin,resin-os/meta-resin,resin-os/meta-resin,resin-os/meta-resin