Create a python module under the kubeflow.kubeflow package that will
be exposing common code and a base app the takes care of:
* Exceptions handling
* Common routes for serving static files and their cache control policy
* Authorization checks with SubjectAccessReview
* Authentication checks on the Kubeflow headers
* Common helper functions for dates, yaml parsing etc
* health/liveness probes
Backends that are written with Python/Flask should use this common code
in order for us to reduce code duplication and have our backends align
with our accepted practices.
Signed-off-by: Kimonas Sotirchos <kimwnasptd@arrikto.com>