Networks tab unexpectedly locked after saving changes

[Julia Aranovich]

Steps to reproduce:
1. create default env
2. go to Networks tab
3. set vlan id range as 10-10 in L2 setting section
4. click Save Changes

Expected result: changes are not saved because of Nailgun returns validation error (vlan id range should contain more than 1 id).Controls and Save Changes button is not disabled.

Actual result: the tab stays locked, including Save Changes button. No errors shown on UI. And JS exception in browser console.

[Julia Aranovich (jkirnosova)]

The issue is that UI expects to get a 'check_networks' task after saving failure. But this task does not come, because data saving failed in Nailgun validator, not netwok checker. UI should support such cases.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/249108

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/249108
Committed: https://git.openstack.org/cgit/openstack/fuel-web/commit/?id=5a2d587c22ad09bca240e4831437a353ea1d04a2
Submitter: Jenkins
Branch: master

commit 5a2d587c22ad09bca240e4831437a353ea1d04a2
Author: Alexandra Morozova <email address hidden>
Date: Tue Nov 24 11:08:17 2015 +0100

    Unlocking Networks tab in case of save changes error

    Closes-Bug: #1518201
    Change-Id: Ib43973a4031f5b289ead5508c371990519fa386d

[Anastasia Palkina (apalkina)]

Verified on ISO #212

VERSION:
  feature_groups:
    - mirantis
  production: "docker"
  release: "8.0"
  openstack_version: "2015.1.0-8.0"
  api: "1.0"
  build_number: "212"
  build_id: "212"
  fuel-nailgun_sha: "13d1800be2452bd297555eedf051bda469b5663b"
  python-fuelclient_sha: "4f9a873b1ae68271bb848a1145b3cf912a176f4b"
  fuel-agent_sha: "f0e09fa7a30b5ab87e901601bfb6c1e339a6bdaa"
  fuel-nailgun-agent_sha: "b56f832abc18aee9a8c603fd6cc2055c5f4287bc"
  astute_sha: "d2c1b401816c6f0341902272f37018b9cec3c775"
  fuel-library_sha: "c892d2919620947225687ccde63d0e038784f0a2"
  fuel-ostf_sha: "5cf8c484a9a4f45f353468438cf98f1b5a5c5dfb"
  fuel-createmirror_sha: "9b335c8d551c87d788166947cb7ed519757881e8"
  fuelmenu_sha: "9627849843e84b7f01c44bd79898a8d62d96ce66"
  shotgun_sha: "34a081508b603723e14f9415a62373be39f3685f"
  network-checker_sha: "2c62cd52655ea6456ff6294fd63f18d6ea54fe38"
  fuel-upgrade_sha: "1e894e26d4e1423a9b0d66abd6a79505f4175ff6"
  fuelmain_sha: "daed38102b6074393821d675e3d7d866fcdb3da5"