oauth-proxy sidecar image update

[gerardcl]

Describe the bug Current ODS quickstarters that make use of the openshift oauth-proxy sidecar container are working with the image openshift/oauth-proxy:latest (check it here), and that is no longer working as expected.

RedHat catalogue provides image registry.redhat.io/openshift4/ose-oauth-proxy:latest, which is the right/maintained one (see catalogue)

To Reproduce Steps to reproduce the behavior:

1. Provision jupyter or r-shiny
2. When running on new OCP4 clusters it does not work

Expected behavior The OpenShift OAuth Proxy shall work.

Affected version (please complete the following information):

• OpenShift: >3.9
• OpenDevStack: 4, master