Aviv maybe this should be an exit code for run_suite?

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/autotest/+/b79379f47294920f8d44227e93a704e12724f05b

commit b79379f47294920f8d44227e93a704e12724f05b
Author: Simran Basi <sbasi@google.com>
Date: Wed Feb 15 21:33:10 2017

[autotest] Move MobLab image storage cleanup and ensure moblab_RunSuite runs a test.

Fixing two problems with this CL.

1) Migrates the cleanup of the moblab image storage folder
   from moblab_host to the moblab_RunSuite test.

2) Updates the moblab_RunSuite test and run_suite to ensure
   atleast a single test is ran to prevent breakages that
   create 0 tests.

BUG= chromium:671709 ,chromium:642905
TEST=None

Change-Id: Ief1567c0c1a692d4ca10735b30f49cc43776e9ed
Reviewed-on: https://chromium-review.googlesource.com/437750
Commit-Ready: Simran Basi <sbasi@chromium.org>
Tested-by: Simran Basi <sbasi@chromium.org>
Reviewed-by: Dan Shi <dshi@google.com>

[modify] https://crrev.com/b79379f47294920f8d44227e93a704e12724f05b/site_utils/run_suite.py
[modify] https://crrev.com/b79379f47294920f8d44227e93a704e12724f05b/server/site_tests/moblab_RunSuite/moblab_RunSuite.py
[modify] https://crrev.com/b79379f47294920f8d44227e93a704e12724f05b/server/hosts/moblab_host.py

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/autotest/+/ba90ec86aa31ac93f2eeba1f5407f0426ced508d

commit ba90ec86aa31ac93f2eeba1f5407f0426ced508d
Author: Simran Basi <sbasi@chromium.org>
Date: Fri Feb 17 06:59:08 2017

Revert "[autotest] Move MobLab image storage cleanup and ensure moblab_RunSuite runs a test."

This reverts commit b79379f47294920f8d44227e93a704e12724f05b.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> [autotest] Move MobLab image storage cleanup and ensure moblab_RunSuite runs a test.
> 
> Fixing two problems with this CL.
> 
> 1) Migrates the cleanup of the moblab image storage folder
>    from moblab_host to the moblab_RunSuite test.
> 
> 2) Updates the moblab_RunSuite test and run_suite to ensure
>    atleast a single test is ran to prevent breakages that
>    create 0 tests.
> 
> BUG= chromium:671709 ,chromium:642905
> TEST=None
> 
> Change-Id: Ief1567c0c1a692d4ca10735b30f49cc43776e9ed
> Reviewed-on: https://chromium-review.googlesource.com/437750
> Commit-Ready: Simran Basi <sbasi@chromium.org>
> Tested-by: Simran Basi <sbasi@chromium.org>
> Reviewed-by: Dan Shi <dshi@google.com>
> 

TBR=sbasi@chromium.org,sbasi@google.com,dshi@google.com,dshi@chromium.org,akeshet@chromium.org
# Not skipping CQ checks because original CL landed > 1 day ago.
BUG= chromium:671709 ,chromium:642905

Change-Id: Ie2f7b78fe5fd39b004436b367ab62050ae76dc1b
Reviewed-on: https://chromium-review.googlesource.com/444310
Reviewed-by: Simran Basi <sbasi@chromium.org>
Tested-by: Simran Basi <sbasi@chromium.org>
Commit-Queue: Xixuan Wu <xixuan@chromium.org>

[modify] https://crrev.com/ba90ec86aa31ac93f2eeba1f5407f0426ced508d/site_utils/run_suite.py
[modify] https://crrev.com/ba90ec86aa31ac93f2eeba1f5407f0426ced508d/server/site_tests/moblab_RunSuite/moblab_RunSuite.py
[modify] https://crrev.com/ba90ec86aa31ac93f2eeba1f5407f0426ced508d/server/hosts/moblab_host.py

Hi, this bug has not been updated recently. Please acknowledge the bug and provide status within two weeks (6/22/2018), or the bug will be closed. Thank you.