* docker images are now built on k8s: test run
* copy check_sync.sh in build-linux job
* copy scripts/docker/hub/* in build-linux job
* removed cache var
* cleanup, no more nightly dockers
* cleanup in dockerfile
* some new tags
* removed sccsche debug log, cleanup
* no_gits, new artifacts dir, changed scripts. Test run.
* define version once
* one source for TRACK
* stop kovan onchain updates
* moved changes for two images to a new branch
* rename Dockerfile
* no need in libudev-dev
