Table filter does not support other languages

[Wangliangyu]

Example:

- Set the language to others except English
- Access /project/networks/
- Filter by external, such as other languages yes, like Chinese '是'/ Japanese‘はい’...
- Throw "Network list can not be retrieved" error message

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/616744

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/616744
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=02b6c1b405d779d2df7897bf67bc39133069d0e6
Submitter: Zuul
Branch: master

commit 02b6c1b405d779d2df7897bf67bc39133069d0e6
Author: wangliangyu <email address hidden>
Date: Fri Nov 9 10:19:28 2018 +0800

    Make table filters valid for every languages

    As we known, the table support filtered by local language
    with some filters mapping, like below:
    https://github.com/openstack/horizon/blob/master/openstack_dashboard/dashboards/project/networks/views.py#L46
    We use the filter string given by user and look valid values
    in those filters mapping. But the keys in filters mapping,
    which is django.utils.functional.__proxy__, does not match
    the filter string.
    This commit valid them.

    Change-Id: I40cb50bbf08fc457967615f2654026cfdafb9232
    Closes-Bug: #1802228

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/horizon 15.0.0.0b2 development milestone.