[DVR] Non implemented error by updating Distributed router to Centralized

[Kristina Berezovskaia]

When we try to update a Distributed router to centralized non implemented error occurs. We need more concrete message

Steps to reproduce
1) Deploy env with DVR
2) Create router with Distributed=True
3) Try to update it in CLI to centralized:
neutron router-update test_router --distributed=False
An error occurs:
501-{u'NotImplementedError': {u'message': u'', u'type': u'NotImplementedError', u'detail': u''}}

Env:
neutron+ubuntu+gre with l2 pop+dvr, 3 controllers, 2 compute

iso:
{"build_id": "2015-06-26_21-35-54", "build_number": "108", "release_versions": {"2014.2.2-7.0": {"VERSION": {"build_id": "2015-06-26_21-35-54", "build_number": "108", "api": "1.0", "fuel-library_sha": "1964109a6893cdbb88c2383bc6661d4c7dfad198", "nailgun_sha": "64b33b411e8f4eaf7515c496c18d8b170e56e956", "feature_groups": ["mirantis"], "openstack_version": "2014.2.2-7.0", "production": "docker", "python-fuelclient_sha": "79f6129e3b6b440c96ac9e96041fad4fd2e64379", "astute_sha": "776157f722b13aff5f59bc098cf948793e6498ef", "fuel-ostf_sha": "69e7fa120e8efa7ed74d98efc63079d2f5c69d7b", "release": "7.0", "fuelmain_sha": "89343abbaf0294371d999a0c371842d02c7cf5db"}}}, "auth_required": true, "api": "1.0", "fuel-library_sha": "1964109a6893cdbb88c2383bc6661d4c7dfad198", "nailgun_sha": "64b33b411e8f4eaf7515c496c18d8b170e56e956", "feature_groups": ["mirantis"], "openstack_version": "2014.2.2-7.0", "production": "docker", "python-fuelclient_sha": "79f6129e3b6b440c96ac9e96041fad4fd2e64379", "astute_sha": "776157f722b13aff5f59bc098cf948793e6498ef", "fuel-ostf_sha": "69e7fa120e8efa7ed74d98efc63079d2f5c69d7b", "release": "7.0", "fuelmain_sha": "89343abbaf0294371d999a0c371842d02c7cf5db"}

Upstream bug in Neutron:
https://bugs.launchpad.net/neutron/+bug/1477509

[Fuel Devops McRobotson (fuel-devops-robot)]

Fix proposed to branch: openstack-ci/fuel-7.0/2015.1.0
Change author: Sergey Belous <email address hidden>
Review: https://review.fuel-infra.org/9869

[Fuel Devops McRobotson (fuel-devops-robot)]

Reviewed: https://review.fuel-infra.org/9869
Submitter: mos-infra-ci <>
Branch: openstack-ci/fuel-7.0/2015.1.0

Commit: 29cad5f8a7f2cfb860e1609966f03d6be0a07dce
Author: Sergey Belous <email address hidden>
Date: Mon Jul 27 12:17:37 2015

Add error message when migrate from distributed router to centralized

When trying to migrate from distributed router to centralized
a NotImplementedError occurs with empty message.
Need to concretize a message.

Closes-Bug: #1477509
Closes-Bug: #1474723
Change-Id: I2b57ec5af38a0f87c1ab256cb8af66bc443be824

[Kristina Berezovskaia (kkuznetsova)]

Verify on
VERSION:
  feature_groups:
    - mirantis
  production: "docker"
  release: "7.0"
  openstack_version: "2015.1.0-7.0"
  api: "1.0"
  build_number: "104"
  build_id: "2015-07-28_21-24-26"
  nailgun_sha: "b3972d61b525bff8f5ffb26ff98422ab6530d265"
  python-fuelclient_sha: "f04e6c46783ecd6000df31b61b6749da66d4d828"
  fuel-agent_sha: "355c08a04917f047b88f66242767049d2b1d0ff0"
  fuel-nailgun-agent_sha: "1512b9af6b41cc95c4d891c593aeebe0faca5a63"
  astute_sha: "34e0493afa22999c4a07d3198ceb945116ab7932"
  fuel-library_sha: "8e64ae8e018d5b119c8e2ea49f6a83467b970a66"
  fuel-ostf_sha: "888baa3eab00242bf98eccdda36144deb7683bb3"
  fuelmain_sha: "de5b333815f8541224c6726dc8446ffc7fb18b5b"

New message is "Not supported: Migration from distributed router to centralized"
Fix Committed -> Fix Released