Show all when the network list or router list filtered by tenant

[Wangliangyu]

1.Access Admin->Netwrok->Netwroks or Admin->Network->Routers and select the tenant filter;
2.Filter a tenant which does not exist;
3.Now,the all result will be shown in page, not an empty list.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/536687

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/536687
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=00ecfcdb0b8bcd2de93a80f0929c4d627d5dc04a
Submitter: Zuul
Branch: master

commit 00ecfcdb0b8bcd2de93a80f0929c4d627d5dc04a
Author: wangliangyu <email address hidden>
Date: Tue Jan 23 14:31:12 2018 +0800

    Filtering networks or routers by non-existing tenants return an empty list

    When networks or routers are filtered by a tenant which does not exist,
    there will be return a list no filtered. But we expect an empty list.

    Change-Id: I8faca01ab67240a76818d6752f796a6de3c51b5f
    Closes-Bug: #1744846

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/horizon 14.0.0.0b1 development milestone.