Use journald for logging with systemd

Use journald for logging with systemd

/var/log/messages is an existing file on Debian and hence unusable
to store logs. Rather than trying to figure out a path that would
work across all different distributions, use journald for logging
on systemd based systems.

Review-Url: https://codereview.chromium.org/2991423002
Committed: https://github.com/luci/luci-py/commit/55e6a2a93ab96fb928638aca733ae399eec4d8e0

[phosek, 2017-08-04 06:38:39]

Description was changed from

==========
Use journald for logging with systemd

/var/log/messages is an existing file on Debian and hence unusable
to store logs. Rather than trying to figure out a path that would
work across all different distributions, use journald for logging
on systemd based systems.
==========

to

==========
Use journald for logging with systemd

/var/log/messages is an existing file on Debian and hence unusable
to store logs. Rather than trying to figure out a path that would
work across all different distributions, use journald for logging
on systemd based systems.
==========

[phosek, 2017-08-04 06:38:39]

phosek@google.com changed reviewers:
+ smut@google.com, vadimsh@chromium.org

[phosek, 2017-08-04 06:38:43]

phosek@google.com changed reviewers:
+ phosek@google.com

[smut, 2017-08-04 23:20:53]

lgtm

[Petr Hosek, 2017-08-04 23:55:37]

The CQ bit was checked by phosek@chromium.org

[Petr Hosek, 2017-08-04 23:55:38]

The patchset sent to the CQ was uploaded after l-g-t-m from smut@google.com
Link to the patchset: https://codereview.chromium.org/2991423002/#ps40001
(title: "Update class name")

[commit-bot: I haz the power, 2017-08-04 23:55:48]

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, 2017-08-04 23:57:59]

CQ is committing da patch.

Bot data: {"patchset_id": 40001, "attempt_start_ts": 1501890937300700,
"parent_rev": "a0cd80426292b7b4775ed2568d7f5130785f8c88", "commit_rev":
"55e6a2a93ab96fb928638aca733ae399eec4d8e0"}

[commit-bot: I haz the power, 2017-08-04 23:58:02]

Description was changed from

==========
Use journald for logging with systemd

/var/log/messages is an existing file on Debian and hence unusable
to store logs. Rather than trying to figure out a path that would
work across all different distributions, use journald for logging
on systemd based systems.
==========

to

==========
Use journald for logging with systemd

/var/log/messages is an existing file on Debian and hence unusable
to store logs. Rather than trying to figure out a path that would
work across all different distributions, use journald for logging
on systemd based systems.

Review-Url: https://codereview.chromium.org/2991423002
Committed:
https://github.com/luci/luci-py/commit/55e6a2a93ab96fb928638aca733ae399eec4d8e0
==========

[commit-bot: I haz the power, 2017-08-04 23:58:03]

Committed patchset #3 (id:40001) as
https://github.com/luci/luci-py/commit/55e6a2a93ab96fb928638aca733ae399eec4d8e0