Modify recover_duts to ping the default gateway rather than google.com.

During testing, we may mock out DNS meaning www.google.com will be
unreachable. This removes the depenedency on DNS from recover_duts by
instead pinging the default gateway.

BUG=chromium-os:35984
TEST=Ran script on device w/without networking.

Change-Id: I5ec8276411f9b1532d4ab0882483770337faea33
Reviewed-on: https://gerrit.chromium.org/gerrit/37588
Tested-by: Chris Sosa <sosa@chromium.org>
Reviewed-by: Paul Stewart <pstew@chromium.org>
Commit-Ready: Chris Sosa <sosa@chromium.org>
Reviewed-by: Chris Sosa <sosa@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/38151
1 file changed