The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/chromite/+/e706e3b896dc3f3e4f5d3c4b12af43aa0ea7309c

commit e706e3b896dc3f3e4f5d3c4b12af43aa0ea7309c
Author: Xixuan Wu <xixuan@chromium.org>
Date: Tue Aug 28 19:02:56 2018

cbuildbot: Add enable_skylab=False to cts suites.

BUG= chromium:876896 
TEST=Ran unittest.

Change-Id: I06c685954fd94c91ba216705a442e9ecace6649d
Reviewed-on: https://chromium-review.googlesource.com/1185902
Reviewed-by: Aviv Keshet <akeshet@chromium.org>
Tested-by: Xixuan Wu <xixuan@chromium.org>
Commit-Queue: Xixuan Wu <xixuan@chromium.org>

[modify] https://crrev.com/e706e3b896dc3f3e4f5d3c4b12af43aa0ea7309c/config/chromeos_config.py
[modify] https://crrev.com/e706e3b896dc3f3e4f5d3c4b12af43aa0ea7309c/config/config_dump.json
[modify] https://crrev.com/e706e3b896dc3f3e4f5d3c4b12af43aa0ea7309c/lib/config_lib.py
[modify] https://crrev.com/e706e3b896dc3f3e4f5d3c4b12af43aa0ea7309c/cbuildbot/builders/simple_builders.py

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/chromite/+/11dd0afb3809142727f619511b0983c288e7ff5e

commit 11dd0afb3809142727f619511b0983c288e7ff5e
Author: Xixuan Wu <xixuan@chromium.org>
Date: Tue Aug 28 19:03:39 2018

cbuildbot: Move reef to skylab and non-important.

BUG= chromium:876896 
TEST=None

Change-Id: Iefee3dddb9c81151e4cf2a0290e14485cf24b357
Reviewed-on: https://chromium-review.googlesource.com/1185910
Reviewed-by: Xixuan Wu <xixuan@chromium.org>
Commit-Queue: Xixuan Wu <xixuan@chromium.org>
Tested-by: Xixuan Wu <xixuan@chromium.org>

[modify] https://crrev.com/11dd0afb3809142727f619511b0983c288e7ff5e/config/chromeos_config.py

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/autotest/+/84621e51056e43baa044ba94f103bfbe469205cc

commit 84621e51056e43baa044ba94f103bfbe469205cc
Author: Xixuan Wu <xixuan@chromium.org>
Date: Tue Aug 28 22:41:05 2018

autotest: Add --board support for atest host migrate.

In migrating unibuild like reef, RPC get_hosts cannot find any host
with model:reef. These hosts are with board:reef and different models.
This CL is to support to migrate all hosts in the same board & pool.

BUG= chromium:876896 
TEST=Ran ./cli/atest host migrate.

Change-Id: I7e67036d107e76958c570a082aeec33bdf66e025
Reviewed-on: https://chromium-review.googlesource.com/1194431
Tested-by: Xixuan Wu <xixuan@chromium.org>
Reviewed-by: Prathmesh Prabhu <pprabhu@chromium.org>
Commit-Queue: Xixuan Wu <xixuan@chromium.org>

[modify] https://crrev.com/84621e51056e43baa044ba94f103bfbe469205cc/cli/host.py

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/chromite/+/86a2ffa02e46385f7574e0d77bf8812b78528818

commit 86a2ffa02e46385f7574e0d77bf8812b78528818
Author: Xixuan Wu <xixuan@chromium.org>
Date: Wed Aug 29 16:02:45 2018

Revert "cbuildbot: Move reef to skylab and non-important."

This reverts commit 11dd0afb3809142727f619511b0983c288e7ff5e.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> cbuildbot: Move reef to skylab and non-important.
> 
> BUG= chromium:876896 
> TEST=None
> 
> Change-Id: Iefee3dddb9c81151e4cf2a0290e14485cf24b357
> Reviewed-on: https://chromium-review.googlesource.com/1185910
> Reviewed-by: Xixuan Wu <xixuan@chromium.org>
> Commit-Queue: Xixuan Wu <xixuan@chromium.org>
> Tested-by: Xixuan Wu <xixuan@chromium.org>

Bug:  chromium:876896 
Change-Id: Iaaa61e93b29c35b1fc3452b207c8c07e4fd5aa16
Reviewed-on: https://chromium-review.googlesource.com/1194196
Reviewed-by: Xixuan Wu <xixuan@chromium.org>
Commit-Queue: Xixuan Wu <xixuan@chromium.org>
Tested-by: Xixuan Wu <xixuan@chromium.org>

[modify] https://crrev.com/86a2ffa02e46385f7574e0d77bf8812b78528818/config/chromeos_config.py

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/chromite/+/df4880942b7d64a42b38050ff740ae839da68f7a

commit df4880942b7d64a42b38050ff740ae839da68f7a
Author: Xixuan Wu <xixuan@chromium.org>
Date: Wed Aug 29 17:00:23 2018

cbuildbot: move reef-release to skylab and non-important.

BUG= chromium:876896 
TEST=Pre-CQ.

Change-Id: Iab6f1d17142135161bae7c3f928040116dc26ecb
Reviewed-on: https://chromium-review.googlesource.com/1194197
Commit-Ready: Xixuan Wu <xixuan@chromium.org>
Tested-by: Xixuan Wu <xixuan@chromium.org>
Reviewed-by: Xixuan Wu <xixuan@chromium.org>

[modify] https://crrev.com/df4880942b7d64a42b38050ff740ae839da68f7a/config/chromeos_config.py
[modify] https://crrev.com/df4880942b7d64a42b38050ff740ae839da68f7a/config/config_dump.json

https://cros-goldeneye.corp.google.com/chromeos/legoland/builderHistory?buildConfig=reef-release&buildBranch=

It's working in skylab. But failed due to DUT failure. So I will mark this bug fixed.

cc @allen to know that just like CQ, DUTs in pool:bvt & board:reef are not stable enough to finish tests.