[octane] can't create repo backup without environments

[sryabin]

Steps to reproduce:
 1. Install Fuel Admin node using ISO 7.0
 2. Install fuel-octane from rpm
 3. Create repo backup

 Actual result:
2016-04-14 11:29:47 INFO octane.util.subprocess Started process sudo[31435]: dockerctl shell postgres sudo -u postgres psql nailgun --tuples-only -c 'select editable from attributes;'
2016-04-14 11:29:47 INFO octane.util.subprocess Process sudo finished with return value 0
2016-04-14 11:29:47 INFO octane.util.subprocess Started process sudo[31465]: dockerctl shell postgres sudo -u postgres psql nailgun --tuples-only -c 'select generated from attributes;'
2016-04-14 11:29:47 INFO octane.util.subprocess Process sudo finished with return value 0
2016-04-14 11:29:47 ERROR octane Nothing to backup

Reproducibility:
 100%
Workaround:
  No
Impact:
  High
Description of the environment:
VERSION:
  feature_groups:
    - mirantis
  production: "docker"
  release: "7.0"
  openstack_version: "2015.1.0-7.0"
  api: "1.0"
  build_number: "301"
  build_id: "301"
  nailgun_sha: "4162b0c15adb425b37608c787944d1983f543aa8"
  python-fuelclient_sha: "486bde57cda1badb68f915f66c61b544108606f3"
  fuel-agent_sha: "50e90af6e3d560e9085ff71d2950cfbcca91af67"
  fuel-nailgun-agent_sha: "d7027952870a35db8dc52f185bb1158cdd3d1ebd"
  astute_sha: "6c5b73f93e24cc781c809db9159927655ced5012"
  fuel-library_sha: "5d50055aeca1dd0dc53b43825dc4c8f7780be9dd"
  fuel-ostf_sha: "2cd967dccd66cfc3a0abd6af9f31e5b4d150a11c"
  fuelmain_sha: "a65d453215edb0284a2e4761be7a156bb5627677"

Additional information:
 No

[Oleg S. Gelbukh (gelbuhos)]

This bug is fixed by the following change, unfortunately it misses the proper Closes-bug attribute:

https://review.openstack.org/#/c/307839/

Changing status to Fix Committed