Updated templates to make them work with Openshift 4.5.x release and Selenium 4.0.0 release drivers.
I deleted BuildConfig and ImeStream objects and we do not have to extend images to support ron-root user and latest images
support them by default.
Updated Chrome and Firefox templates to expose required environment variables (SE_EVENT_BUS_HOST,
SE_EVENT_BUS_PUBLISH_PORT, SE_EVENT_BUS_SUBSCRIBE_PORT) as documented in selenium hub.
Updated README how to create objects after deploying templates.