Upgrade python-kubernetes version in salt-master

[TeddyAndrieux]

Component:

'kubernetes', 'build'

Why this is needed:

Currently we use the python2-kubernetes version available in epel repository which is not the last one so we need to do some tricks to try to handle object with older APIs for example in this commit for Ingress using networking.k8s.io/v1beta1 Api a008d38.
https://github.com/kubernetes-client/python#compatibility

What should be done:

Upgrade python kubernetes in salt-master container to have a version able to handle each and every object of current kubernetes version we use.

Implementation proposal (strongly recommended):

TBD
Some possibility:

• Package python-kubernetes version we want and install it in the salt-master container
• Install python kubernetes directly in the salt-master dockerfile (using pip or something else)

[gdemonet]

Sadly, it seems github.com/kubernetes-client/python does not have (yet) released versions for K8s 1.15 or 1.16... Although 1.15 seems to be in progress (see the 11.0-alpha1)

[NicolasT]

Then maybe we can help maintaining that library? ;-)

[TeddyAndrieux]

Version 1.10.1 just get pushed in epel repository so a008d38 is not longer an issue.

But something still need to be done to have a python kubenretes version able to support the k8s version deployed