[VNC API] Filter list with a wrong attribute name should be ignore

[Édouard Thuleau]

When we list resource with filter pointed to an unknown attribute name, the returned list is empty:

$ curl -s http://contrail2:8082/virtual-networks?filters=foo==bar | jq .
{
  "virtual-networks": []
}

It should list all resources, none of them should be filtered.

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/27956
Submitter: ?douard Thuleau (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/27956
Committed: http://github.org/Juniper/contrail-controller/commit/1378173cb21eb382cfbcaebf927012ae94de5c63
Submitter: Zuul (<email address hidden>)
Branch: master

commit 1378173cb21eb382cfbcaebf927012ae94de5c63
Author: Édouard Thuleau <email address hidden>
Date: Wed Jan 18 19:28:37 2017 +0100

[VNC API Server] API list resource ignores unknown filters

If a resource type is listed with unknown filter(s), we should not take
care of that filter(s).

Change-Id: I1a98c03a178f80da89a72550bd1f553c622be010
Closes-Bug: #1657533