Add a smaller socket timeout much larger than the default to remove AU flakiness.
Add a smaller socket timeout much larger than the default to remove AU flakiness.

DUTs may wait longer than the default 10s to process data from the devserver
if they slow in writing to disk. This bumps up the default to be reasonable
without having the server hang too long.

BUG=chromium-os:31019
TEST=Unittest

Change-Id: I36f5df07eae01cb5b67ee6c8390f4bd7b2c74654
Reviewed-on: https://gerrit.chromium.org/gerrit/25224
Tested-by: Chris Sosa <959d3d631fb6f17f1b07f751372041a1edb210d1@chromium.org>
Reviewed-by: Scott Zawalski <d0bc454f32175e2361d26fbdb5930ff6be11acc5@chromium.org>

coreos/dev-util,marineam/coreos-dev-util,mgireesh05/dev-util,mgireesh05/dev-util,coreos/dev-util,coreos/dev-util,mgireesh05/dev-util,marineam/coreos-dev-util