Add the posibility to connect to control plane through a proxy server

[mpolonen]

I am trying to setup job executor service to work with Cloud Automation Saas.

I don't have a direct internet connection so I need to use a proxy.

For job executor service there is a pretty straightforward workaround: I setup a configmap and use kubectl env to attach that and it works fine.

However it seems that for initcontainer I need to build a customized container with proxy envinronment variables built into the container.

Please add suppor for specifying proxy variables for job executor service and job executor initcontainer