[Swift] Package python-swift rewrites groups for swift user

Cannot create a Swift container and it looks like Swift doesn't work at all.

STEPS TO REPRODUCE:
1. Deploy OpenStack environment (see configuration below).
2. Go to the Horizon. Log in to it.
3. Navigate to Project -> Object Store -> Containers. At this point we already can see the error (see screenshot-1.png).
4. Click on the "Create Container" button.
5. Enter the name of a container.
6. Click on the "Create Container" button.

EXPECTED RESULT:
The container has been successfully created.

ACTUAL RESULT:
The container has not been created. See screenshot-2.png.

In addition I have run Swift tempest tests and all of them have failed. My steps:
1. The Fuel master node must have Internet connection. Log into the Fuel master node via SSH.
2. # yum install -y git
3. # git clone https://github.com/Mirantis/mos-tempest-runner.git
4. # cd mos-tempest-runner/ && ./setup_env.sh
5. # ./rejoin.sh
6. $ run_tests tempest.api.object_storage

See tempest-report.html for more details in attachments.

VERSION:
  feature_groups:
    - mirantis
  production: "docker"
  release: "7.0"
  openstack_version: "2015.1.0-7.0"
  api: "1.0"
  build_number: "132"
  build_id: "2015-08-03_22-04-28"
  nailgun_sha: "d1536c3a57459e205e39bc4d86d2b4efc6141c4e"
  python-fuelclient_sha: "4fe70fb5c0ce8905ae5908f63d45b45e89a99340"
  fuel-agent_sha: "1fe47720ba554818a0be707f2e16281791492d50"
  fuel-nailgun-agent_sha: "1512b9af6b41cc95c4d891c593aeebe0faca5a63"
  astute_sha: "6d09f3fc7f69ac558095299211ebfd081fa54b8f"
  fuel-library_sha: "1cfd80a833ed27c777c950006a8d4e4080f81616"
  fuel-ostf_sha: "53109a99d923cccdf88c5cf5aba0af8050df47e3"
  fuelmain_sha: "7a374fbd1f5ebde943cb391a4f71b94888ce4a15"

ENVIRONMENT:
Ubuntu, Neutron with VLAN segmentation, Ceph for volumes, Ceph for images, Ceph for ephemeral volumes, Ceilometer enabled, 1 (controller + mongo), 1 (compute + ceph-osd).

Pay attention that Ceph RadosGW is not installed! Swift is installed.

Diagnostic snapshot is attached.