remove log translations

[huanghe]

Log messages are no longer being translated. This removes all use of
the _LE, _LI, and _LW translation markers to simplify logging and to
avoid confusion with new contributions

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/448529

[Ihar Hrachyshka (ihar-hrachyshka)]

Related neutron-lib patches: https://review.openstack.org/#/q/status:open+project:openstack/neutron-lib+branch:master+topic:446730

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/446730
Committed: https://git.openstack.org/cgit/openstack/neutron-lib/commit/?id=b87ecb3b8cd66cf91d33852cb9c377efa88ba1b5
Submitter: Jenkins
Branch: master

commit b87ecb3b8cd66cf91d33852cb9c377efa88ba1b5
Author: Ihar Hrachyshka <email address hidden>
Date: Thu Mar 16 09:52:24 2017 +0000

    Enforce log messages not being translated

    This is in line with discussion [1] where translators asked to stop
    translating log messages, leaving translations for user visible messages
    only.

    This patch introduces a new N537 check, and since it is more broad than
    N533 while covering all cases of the latter check, N533 is removed.

    This patch also cleans up _i18n._L? translation hints since they are
    internal and won't be allowed anymore.

    [1] http://lists.openstack.org/pipermail/openstack-dev/2017-March/114191.html

    Related-Bug: #1674569
    Change-Id: I2813587824eac1a996c715b0c4bd36b0c9580d73

[OpenStack Infra (hudson-openstack)]

Change abandoned by iswarya vakati (<email address hidden>) on branch: master
Review: https://review.openstack.org/448529

[OpenStack Infra (hudson-openstack)]

Change abandoned by Ngo Quoc Cuong (<email address hidden>) on branch: master
Review: https://review.openstack.org/478448