openstack-ansible-ops multinode AIO

# Install latest OSA supported Ansible version
sudo pip install -r https://opendev.org/openstack/openstack-ansible-tests/raw/branch/${OSA_DEPS_BRANCH}/test-ansible-deps.txt
The directory '/home/wartung/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/wartung/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting ansible==2.5.14 (from -r https://opendev.org/openstack/openstack-ansible-tests/raw/branch/stable/rocky/test-ansible-deps.txt (line 1))
  Downloading https://files.pythonhosted.org/packages/ed/85/69aca66b2d59c03f471582f97aaf5efd4d2670de5f86dbbf4fda542444a8/ansible-2.5.14.tar.gz (10.1MB)
    100% |████████████████████████████████| 10.1MB 44kB/s
Collecting ansible-lint==3.4.21 (from -r https://opendev.org/openstack/openstack-ansible-tests/raw/branch/stable/rocky/test-ansible-deps.txt (line 2))
  Downloading https://files.pythonhosted.org/packages/f1/c3/902434e131709640533bc6e8b877ed3a37c93c74082f260611f29d6a6ac1/ansible-lint-3.4.21.tar.gz
Collecting netaddr (from -r https://opendev.org/openstack/openstack-ansible-tests/raw/branch/stable/rocky/test-ansible-deps.txt (line 3))
  Downloading https://files.pythonhosted.org/packages/ba/97/ce14451a9fd7bdb5a397abf99b24a1a6bb7a1a440b019bebd2e9a0dbec74/netaddr-0.7.19-py2.py3-none-any.whl (1.6MB)
    100% |████████████████████████████████| 1.6MB 263kB/s
Collecting jinja2 (from ansible==2.5.14->-r https://opendev.org/openstack/openstack-ansible-tests/raw/branch/stable/rocky/test-ansible-deps.txt (line 1))
  Downloading https://files.pythonhosted.org/packages/1d/e7/fd8b501e7a6dfe492a433deb7b9d833d39ca74916fa8bc63dd1a4947a671/Jinja2-2.10.1-py2.py3-none-any.whl (124kB)
    100% |████████████████████████████████| 126kB 2.4MB/s
Collecting PyYAML (from ansible==2.5.14->-r https://opendev.org/openstack/openstack-ansible-tests/raw/branch/stable/rocky/test-ansible-deps.txt (line 1))
  Downloading https://files.pythonhosted.org/packages/e3/e8/b3212641ee2718d556df0f23f78de8303f068fe29cdaa7a91018849582fe/PyYAML-5.1.2.tar.gz (265kB)
    100% |████████████████████████████████| 266kB 1.3MB/s
Collecting paramiko (from ansible==2.5.14->-r https://opendev.org/openstack/openstack-ansible-tests/raw/branch/stable/rocky/test-ansible-deps.txt (line 1))
  Downloading https://files.pythonhosted.org/packages/4b/80/74dace9e48b0ef923633dfb5e48798f58a168e4734bca8ecfaf839ba051a/paramiko-2.6.0-py2.py3-none-any.whl (199kB)
    100% |████████████████████████████████| 200kB 1.6MB/s
Exception:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/pip/basecommand.py", line 211, in main
    status = self.run(options, args)
  File "/usr/local/lib/python2.7/dist-packages/pip/commands/install.py", line 294, in run
    requirement_set.prepare_files(finder)
  File "/usr/local/lib/python2.7/dist-packages/pip/req/req_set.py", line 334, in prepare_files
    functools.partial(self._prepare_file, finder))
  File "/usr/local/lib/python2.7/dist-packages/pip/req/req_set.py", line 321, in _walk_req_to_install
    more_reqs = handler(req_to_install)
  File "/usr/local/lib/python2.7/dist-packages/pip/req/req_set.py", line 561, in _prepare_file
    set(req_to_install.extras) - set(dist.extras)
  File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/pkg_resources/__init__.py", line 2774, in extras
    return [dep for dep in self._dep_map if dep]
  File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/pkg_resources/__init__.py", line 2797, in _dep_map
    self.__dep_map = self._compute_dependencies()
  File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/pkg_resources/__init__.py", line 2830, in _compute_dependencies
    common = frozenset(reqs_for_extra(None))
  File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/pkg_resources/__init__.py", line 2827, in reqs_for_extra
    if req.marker_fn(override={'extra':extra}):
  File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/_markerlib/markers.py", line 113, in marker_fn
    return eval(compiled_marker, environment)
  File "<environment marker>", line 1, in <module>
NameError: name 'platform_system' is not defined