Restore updating openstacksdk by autoupdater

Openstacksdk in new versions (after 0.31.1) is not compatible with our OpenStack cloud which version is Mitaka, after succesfull update of our cloud we should update openstacksdk to the newest version.

The following discussion from !59 (merged) should be addressed:

[ ] @porzech started a discussion: (+3 comments)

> Chyba jednak wolałbym to usunąć i dodać issue na to - @tziol @korthalsp, która wersja Wam bardziej odpowiada?

Also package python-openstackclient in version 4.0.0 is not compatiblie with old API of our cloud so we need to stop updating it too.

Code to restore:

- name: "python2/python-openstackclient"
  documentation: "README.md"
  repository_file:
    path: "Dockerfile"
    pattern: "python-openstackclient==(\\d+\\.\\d+\\.\\d+)"
  origin:
    source_type: "pypi"
    source: "python-openstackclient"
    version_pattern: "\\d+\\.\\d+\\.\\d+"

- name: "python2/openstacksdk"
  documentation: "README.md"
  repository_file:
    path: "Dockerfile"
    pattern: "openstacksdk==(\\d+\\.\\d+\\.\\d+)"
  origin:
    source_type: "pypi"
    source: "openstacksdk"
    version_pattern: "\\d+\\.\\d+\\.\\d+"