The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/autotest/+/b940817305207a493402e72b05601aad0038e8ee

commit b940817305207a493402e72b05601aad0038e8ee
Author: Keith Haddow <haddowk@chromium.org>
Date: Sun Aug 06 05:07:55 2017

[moblab] Provide default for getting the test args from config.

If a user AU's and does not go through the config wizard again
the wifi test args are missing from the config.

Provide a default value in the get request.

BUG= chromium:752558 
TEST=unit tests and locally on moblab.

Change-Id: If1904a289df8effd54b62158f7310a17c0a6fe09
Reviewed-on: https://chromium-review.googlesource.com/602677
Commit-Ready: Keith Haddow <haddowk@chromium.org>
Tested-by: Keith Haddow <haddowk@chromium.org>
Reviewed-by: Keith Haddow <haddowk@chromium.org>
Reviewed-by: Michael Tang <ntang@chromium.org>

[modify] https://crrev.com/b940817305207a493402e72b05601aad0038e8ee/frontend/afe/moblab_rpc_interface.py

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/autotest/+/007bedccab6deeea3d7035e301111ae17a0df21b

commit 007bedccab6deeea3d7035e301111ae17a0df21b
Author: Keith Haddow <haddowk@chromium.org>
Date: Mon Aug 07 05:34:55 2017

[moblab] Provide default for getting the test args from config.

If a user AU's and does not go through the config wizard again
the wifi test args are missing from the config.

Provide a default value in the get request.

BUG= chromium:752558 
TEST=unit tests and locally on moblab.

Change-Id: If1904a289df8effd54b62158f7310a17c0a6fe09
Reviewed-on: https://chromium-review.googlesource.com/602677
Commit-Ready: Keith Haddow <haddowk@chromium.org>
Tested-by: Keith Haddow <haddowk@chromium.org>
Reviewed-by: Keith Haddow <haddowk@chromium.org>
Reviewed-by: Michael Tang <ntang@chromium.org>
(cherry picked from commit b940817305207a493402e72b05601aad0038e8ee)
Reviewed-on: https://chromium-review.googlesource.com/603129
Commit-Queue: Keith Haddow <haddowk@chromium.org>

[modify] https://crrev.com/007bedccab6deeea3d7035e301111ae17a0df21b/frontend/afe/moblab_rpc_interface.py

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/autotest/+/2e7263463063a0d161b467aecb043adcff22b6d2

commit 2e7263463063a0d161b467aecb043adcff22b6d2
Author: Keith Haddow <haddowk@chromium.org>
Date: Mon Aug 07 05:35:06 2017

[moblab] Provide default for getting the test args from config.

If a user AU's and does not go through the config wizard again
the wifi test args are missing from the config.

Provide a default value in the get request.

BUG= chromium:752558 
TEST=unit tests and locally on moblab.

Change-Id: If1904a289df8effd54b62158f7310a17c0a6fe09
Reviewed-on: https://chromium-review.googlesource.com/602677
Commit-Ready: Keith Haddow <haddowk@chromium.org>
Tested-by: Keith Haddow <haddowk@chromium.org>
Reviewed-by: Keith Haddow <haddowk@chromium.org>
Reviewed-by: Michael Tang <ntang@chromium.org>
(cherry picked from commit b940817305207a493402e72b05601aad0038e8ee)
Reviewed-on: https://chromium-review.googlesource.com/603128
Commit-Queue: Keith Haddow <haddowk@chromium.org>

[modify] https://crrev.com/2e7263463063a0d161b467aecb043adcff22b6d2/frontend/afe/moblab_rpc_interface.py

Getting same errors from my moblab (moblab5)

Here's the profile of moblab5:
Board and Stage   : guado_moblab / {***Example: EVT, DVT, PVT...***}
Chrome OS Version : M60 9592.75.0 (Official Build) dev-channel guado_moblab test
BIOS VERSION      : Google_Guado.6301.108.4 / Google_Guado.6301.108.4

CPU arch     : x86_64
CPU model    : Intel(R) Core(TM) i3-5010U CPU @ 2.10GHz
CPU speed    : 2100.0000
Total Memory : 16344976 kB
Memory Type  : 1-78: Samsung | 17249556 | M471B1G73EB0-YK0 1-78: Samsung | 1724a857 | M471B1G73EB0-YK0
SSD Model    : TS128GMTS400                            
SSD Firmware : N1114H  

VPD info:
  ethernet_mac=2C:60:0C:A9:6A:6C
  initial_locale=en-US
  initial_timezone=America/Los_Angeles
  keyboard_layout=xkb:us::eng
  mlb_serial_number=528050QAMBQC0000B
  region=us
  rlz_brand_code=ASUG
  serial_number=F7MSCX003092

Fixed by CP https://chromium-review.googlesource.com/#/c/chromiumos/overlays/board-overlays/+/604482/

Ignore #5 - just fixed by CL https://chromium-review.googlesource.com/602677