Retire gettext.install which installs _() as builtin namespace

[Akihiro Motoki]

As oslo.i18n document [1] suggests, we need to replace _() in the python builtin namespaces with _ defined in _i18n.py in each module. Sharing _() in the builtin namespaces prevents us from looking up per-module translation catalogs because it forces all subprojects to use "neutron" domain.

It is required to support per-project message catalog.

Required actions:

- Introduce _i18.py with a project specific domain as suggested by oslo.i18n.
- Change all related project consumes _() from their own _i18n.py
- Remove gettext.install from neutron/__init__.py.

I will move forward this bug, but anyone can help me.
There are many projects under neutron stadium.

[1] http://docs.openstack.org/developer/oslo.i18n/usage.html

[Akihiro Motoki (amotoki)]

It seems better to start this work after bug 1519493 is completed.

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/250287

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/250946

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/250990

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/250991

[OpenStack Infra (hudson-openstack)]

Change abandoned by Akihiro Motoki (<email address hidden>) on branch: master
Review: https://review.openstack.org/250991
Reason: This change was merged into the depending patch.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/250287
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=bd36baf3ecfa10c7b8e1e012980feacc605d57e4
Submitter: Jenkins
Branch: master

commit bd36baf3ecfa10c7b8e1e012980feacc605d57e4
Author: Akihiro Motoki <email address hidden>
Date: Thu Nov 26 19:32:32 2015 +0900

    I18n related guideline for subprojects

    Related-Bug: #1519493
    Related-Bug: #1520094
    Change-Id: I183c1f2226ee7aef96b958d888ca3b7a3f9e9a2e

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/250990
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=2d8632e412c6187187d44ee169048bf9d4c8c106
Submitter: Jenkins
Branch: master

commit 2d8632e412c6187187d44ee169048bf9d4c8c106
Author: Akihiro Motoki <email address hidden>
Date: Fri Nov 27 03:48:03 2015 +0900

    Use _ from neutron._i18n

    Partial-Bug: #1520094
    Change-Id: I874a4aa1d71d1f7034a1ff0b7450b419ef5c6864

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/250946
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=51d4d858ac4a0a2a8832fab9107fbb5e1d8d7771
Submitter: Jenkins
Branch: master

commit 51d4d858ac4a0a2a8832fab9107fbb5e1d8d7771
Author: Ihar Hrachyshka <email address hidden>
Date: Fri Nov 27 21:30:35 2015 +0100

    Deprecate _ builtin translation function

    This function is discouraged for usage as per oslo.i18n guidelines [1],
    so we should deprecate and remove it.

    [1] http://docs.openstack.org/developer/oslo.i18n/usage.html

    Change-Id: I848ee1dbd16a23c4db42df4690bf139bd769f3e8
    Partial-Bug: #1520094

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/314930

[OpenStack Infra (hudson-openstack)]

Change abandoned by SHIPeiqi (<email address hidden>) on branch: master
Review: https://review.openstack.org/314930

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/320765

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/320772

[OpenStack Infra (hudson-openstack)]

Change abandoned by SHIPeiqi (<email address hidden>) on branch: master
Review: https://review.openstack.org/320765

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/320772
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=19c5ec76464568252f8ca0eae28849b2797111c3
Submitter: Jenkins
Branch: master

commit 19c5ec76464568252f8ca0eae28849b2797111c3
Author: Akihiro Motoki <email address hidden>
Date: Wed May 25 13:12:12 2016 +0900

    Drop neutron/i18n.py in favor of neutron/_i18n.py

    The hacking rule already ensures everyone uses neutron._i18n.
    Now we can drop neutron.i18n.

    Closes-Bug: #1520094
    Change-Id: I1a415c23fd1db103742e8f3a92a3dd26c7252233

[Doug Hellmann (doug-hellmann)]

This issue was fixed in the openstack/neutron 9.0.0.0b2 development milestone.