[moblab] broadcast ping the subnet before listing devices.
When running the moblab run suite test on a fresh install of moblab,
not all devices will be listed by arp. To address this broadcast
ping the subnet to wake up all DUTs on the subnet.
BUG=chromium:402177
TEST=Powerwashed a moblab in the lab and ensured the test now finds
both the DUTs.
Change-Id: I0eaaea1428210b49fcb37e7679ddc3cb5067424e
Reviewed-on: https://chromium-review.googlesource.com/211701
Reviewed-by: Chris Sosa <sosa@chromium.org>
Commit-Queue: Simran Basi <sbasi@chromium.org>
Tested-by: Simran Basi <sbasi@chromium.org>
1 file changed