[Doc] Incorrect installation for kolla-kubernetes by pip

[Yushiro FURUKAWA]

In deployment-guide(https://docs.openstack.org/kolla-kubernetes/latest/deployment-guide.html), following installation exists:

  $ sudo pip install -U kolla-ansible/ kolla-kubernetes/

However, this command cannnot install kolla-kubernetes correctly. Because of following dependencies:

  websocket-client>=0.32.0 (from docker>=2.4.2->kolla-ansible==6.0.0.0b3.dev10)
  websocket-client<=0.40.0,>=0.32.0 (from kubernetes>=1.0.0->kolla-kubernetes==0.6.1.dev158)

Therefore, first constraint only evaluated and installed following websocket-client:

    Collecting websocket-client>=0.32.0 (from docker>=2.4.2->kolla-ansible==6.0.0.0b3.dev10)
      Downloading websocket_client-0.44.0-py2.py3-none-any.whl (199kB)

In order to solve this bug, it's better to swap or execute 'pip install' twice.

[How to reproduce]

$ git clone https://github.com/openstack/kolla-ansible.git
$ git clone https://github.com/openstack/kolla-kubernetes.git
$ sudo pip install -U kolla-ansible/ kolla-kubernetes/
$ kollakube --debug help

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/527401

[OpenStack Infra (hudson-openstack)]

Change abandoned by Yushiro FURUKAWA (<email address hidden>) on branch: master
Review: https://review.openstack.org/527401
Reason: move to https://review.openstack.org/#/c/524125/