tree 7f00d193857d305e4b36b91361c3e6657a7cb691
parent 2fd510d06997e725e822c48fd986b649d63c713d
author Keith Haddow <haddowk@chromium.org> 1550602695 -0800
committer chrome-bot <chrome-bot@chromium.org> 1550643327 -0800

[moblab] Include a retry when searching for the USB drive.

the moblab vm has a flake where it fails to find the USB drive.
As the image to provision is installed on the USB drive when the
VM is created it is important to have this work.

From reading lsusb -v will force a rescan of the USB devices.

TEST=local moblab, tryjobs
BUG=chromium:929438

Change-Id: Ia09a9b647c6bc8631a734c9e7d6353c1c4ff038f
Reviewed-on: https://chromium-review.googlesource.com/1477984
Commit-Ready: Keith Haddow <haddowk@chromium.org>
Tested-by: Keith Haddow <haddowk@chromium.org>
Reviewed-by: Matt Mallett <mattmallett@chromium.org>