Update LogDog client to export its host.

Update LogDog client to export its host.

Make the LogDog client host field accessible to the client.

Defensively confirm to assert that the descriptor is present in the
server's response.

BUG=chromium:687625
TEST=None

Review-Url: https://codereview.chromium.org/2671633002
Committed: https://github.com/luci/luci-go/commit/149de756b08fe70a72945361d12c8353bc8656fa

[dnj, 2017-02-02 02:57:00]

dnj@chromium.org changed reviewers:
+ hinoka@chromium.org

[dnj, 2017-02-02 02:57:01]

PTAL. This set of CLs adds a pRPC service to Milo called "BuildInfo". This
service offers a one-stop shop for users to query Milo about a specific build,
referencing it using familiar terms, and receive canonical build data (mostly
LogDog annotation protobufs) and metadata. It is envisioned as an entry point
for services that wish to learn about builds or view their logs.

CL chain:
https://codereview.chromium.org/2671633002 - (prep) Export host in LogDog
client.
https://codereview.chromium.org/2674603002 - (prep) Milo logdog module exports
AnnotationStream loading.
https://codereview.chromium.org/2675493003 - (prep) Refactor Swarming a bit, add
parallel fetcher.
https://codereview.chromium.org/2667353002 - Barebones (Unimplemented) BuildInfo
service addition.
https://codereview.chromium.org/2676503002 - (prep) Use strict for BuildBot
properties instead of []interface{}
https://codereview.chromium.org/2674513003 - BuildInfo implementation for
BuildBot builds.
https://codereview.chromium.org/2667363002 - BuildInfo implementation for
Swarming Kitchen builds.

[hinoka, 2017-02-02 21:07:02]

lgtm

[dnj, 2017-02-02 21:45:31]

The CQ bit was checked by dnj@chromium.org

[commit-bot: I haz the power, 2017-02-02 21:45:42]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-02-02 21:52:19]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1486071931469270, "parent_rev":
"46a7922ebc0b2af5c4c9151b13745c89c310703f", "commit_rev":
"149de756b08fe70a72945361d12c8353bc8656fa"}

[commit-bot: I haz the power, 2017-02-02 21:52:23]

Description was changed from

==========
Update LogDog client to export its host.

Make the LogDog client host field accessible to the client.

Defensively confirm to assert that the descriptor is present in the
server's response.

BUG=chromium:687625
TEST=None
==========

to

==========
Update LogDog client to export its host.

Make the LogDog client host field accessible to the client.

Defensively confirm to assert that the descriptor is present in the
server's response.

BUG=chromium:687625
TEST=None

Review-Url: https://codereview.chromium.org/2671633002
Committed:
https://github.com/luci/luci-go/commit/149de756b08fe70a72945361d12c8353bc8656fa
==========

[commit-bot: I haz the power, 2017-02-02 21:52:23]

Committed patchset #1 (id:1) as
https://github.com/luci/luci-go/commit/149de756b08fe70a72945361d12c8353bc8656fa