Investigate possibiltity to put proxy into Jenkins image

[hferentschik]

Instead of having Jenkins Idler/Proxy we could build something into the Jenkins image. Effectively there would be two processes in the Jenkins image. The actual Jenkins instance and a proxy of sorts.
This proxy needs to start up quickly so that one can idle the pod using 'oc idle' and wake up in time when a request comes in.

The responsibility of the proxy is to start quickly and respond to the incoming request. At the same time, it monitors the Jenkins startup and once up, delegates to it.