Remove LOG << "Changing alternative service".

Remove LOG << "Changing alternative service".

Remove LOG(WARNING) for changing alternative service in preparation for multiple
alternative services per host.
* This statement was not entirely correct to start with, because it also also
  got logged when no stored alternative service got modified, only the one added
  shadowed the alternative service of the canonical host.
* With multiple alternative services per host, adding one to a host will not
  change an existing one.

BUG=392575
Committed: https://crrev.com/e5e37f81e24845f03b43abdb964cd640ca637773
Cr-Commit-Position: refs/heads/master@{#335079}

[Bence, 2015-06-15 13:55:10]

bnc@chromium.org changed reviewers:
+ rch@chromium.org

[Bence, 2015-06-15 13:55:10]

Ryan: PTAL.  Thanks.

[Ryan Hamilton, 2015-06-18 04:15:59]

lgtm

[Bence, 2015-06-18 11:44:16]

The CQ bit was checked by bnc@chromium.org

[commit-bot: I haz the power, 2015-06-18 11:46:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1188543002/1

[commit-bot: I haz the power, 2015-06-18 12:00:47]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-06-18 12:00:49]

Try jobs failed on following builders:
  chromeos_daisy_chromium_compile_only_ng on tryserver.chromium.linux
(JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromeos_daisy_...)

[Bence, 2015-06-18 17:50:49]

The CQ bit was checked by bnc@chromium.org

[commit-bot: I haz the power, 2015-06-18 17:51:26]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1188543002/1

[commit-bot: I haz the power, 2015-06-18 18:18:10]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-18 18:18:59]

Patchset 1 (id:??) landed as
https://crrev.com/e5e37f81e24845f03b43abdb964cd640ca637773
Cr-Commit-Position: refs/heads/master@{#335079}