swarming: use df's -l argument

swarming: use df's -l argument

This doesn't have an effect on Ubuntu but does on OSX, as it trims 'map -hosts'
and 'map auto_home' which confuses df output processing due to whitespace.

This is not a big deal, just cleanup work. Manually tested on OSX 10.9, 10.12,
Ubuntu 14.04 and 16.04.

R=vadimsh@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2993943002
Committed: https://github.com/luci/luci-py/commit/5fbd31970425a9c0094839c99b63d8bfde605ee9

[Vadim Sh., 2017-08-08 18:25:02]

lgtm

[M-A Ruel, 2017-08-08 18:26:02]

The CQ bit was checked by maruel@chromium.org

[commit-bot: I haz the power, 2017-08-08 18:26:12]

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, 2017-08-08 18:30:03]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1502216762520930, "parent_rev":
"623d6fc93ee051a7b7cd9b92670f89280da7ad6e", "commit_rev":
"5fbd31970425a9c0094839c99b63d8bfde605ee9"}

[commit-bot: I haz the power, 2017-08-08 18:30:10]

Description was changed from

==========
swarming: use df's -l argument

This doesn't have an effect on Ubuntu but does on OSX, as it trims 'map -hosts'
and 'map auto_home' which confuses df output processing due to whitespace.

This is not a big deal, just cleanup work. Manually tested on OSX 10.9, 10.12,
Ubuntu 14.04 and 16.04.

R=vadimsh@chromium.org
BUG=
==========

to

==========
swarming: use df's -l argument

This doesn't have an effect on Ubuntu but does on OSX, as it trims 'map -hosts'
and 'map auto_home' which confuses df output processing due to whitespace.

This is not a big deal, just cleanup work. Manually tested on OSX 10.9, 10.12,
Ubuntu 14.04 and 16.04.

R=vadimsh@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2993943002
Committed:
https://github.com/luci/luci-py/commit/5fbd31970425a9c0094839c99b63d8bfde605ee9
==========

[commit-bot: I haz the power, 2017-08-08 18:30:11]

Committed patchset #1 (id:1) as
https://github.com/luci/luci-py/commit/5fbd31970425a9c0094839c99b63d8bfde605ee9