Comment 3 for bug 1521533

Verification passed on fuel version:
cat /etc/fuel/version.yaml
VERSION:
  feature_groups:
    - mirantis
  production: "docker"
  release: "8.0"
  openstack_version: "2015.1.0-8.0"
  api: "1.0"
  build_number: "247"
  build_id: "247"
  fuel-nailgun_sha: "86cebc1d92c7cc9ca25b00f5590954a7c4f880a0"
  python-fuelclient_sha: "91474bd8c526f4f536ab13368feb4a5c1b84d185"
  fuel-agent_sha: "660c6514caa8f5fcd482f1cc4008a6028243e009"
  fuel-nailgun-agent_sha: "a33a58d378c117c0f509b0e7badc6f0910364154"
  astute_sha: "b60624ee2c5f1d6d805619b6c27965a973508da1"
  fuel-library_sha: "032c707ec800f11044b32733dd4d395e06c209d0"
  fuel-ostf_sha: "65de07b5dce50349e7bc414f364505483c34e2b1"
  fuel-mirror_sha: "bfe7af26b7e6fdd46a16480481cc757f67958177"
  fuelmenu_sha: "fcb15df4fd1a790b17dd78cf675c11c279040941"
  shotgun_sha: "a0bd06508067935f2ae9be2523ed0d1717b995ce"
  network-checker_sha: "a3534f8885246afb15609c54f91d3b23d599a5b1"
  fuel-upgrade_sha: "1e894e26d4e1423a9b0d66abd6a79505f4175ff6"
  fuelmain_sha: "fda7c87dea9fb54c08bd3844d277b2e4778924e4"

Steps for verification:
1. Create env
2. Add 1 controller node with cinder storage
3. Add 1 compute node
4. Deploy cluster
5. Check current default route on compute node
root@node-4:~# ip r show
default via 10.109.7.1 dev br-mgmt
10.109.5.0/24 dev br-fw-admin proto kernel scope link src 10.109.5.9
10.109.7.0/24 dev br-mgmt proto kernel scope link src 10.109.7.3
10.109.9.0/24 dev br-storage proto kernel scope link src 10.109.9.1
unreachable 169.254.169.254 scope host

6. Create override file on compute node
cat /etc/hiera/override/common.yaml
network_scheme:
  endpoints:
    br-fw-admin:
      gateway: ""
    br-mgmt:
      gateway: "10.109.7.254"
7. Run network task from master node
[root@nailgun ~]# fuel --env 1 node --node 4 --tasks netconfig
8. Check default route on compute node
ip r show
default via 10.109.7.254 dev br-mgmt - route change successfull
10.109.5.0/24 dev br-fw-admin proto kernel scope link src 10.109.5.9
10.109.7.0/24 dev br-mgmt proto kernel scope link src 10.109.7.3
10.109.9.0/24 dev br-storage proto kernel scope link src 10.109.9.1
unreachable 169.254.169.254 scope host