This PR adds missing checksums for kubeadm and hyperkube and changes
default version to 1.14.3

Signed-off-by: Sergey Nuzhdin <ipaq.lw@gmail.com>

* Update CI to use 2.10.0 release

* Add rsync as it's required to use synchronize

* Update CI to use 2.9.0 release and update Dockerfile to now use 18.04

* Update CI to use 2.9.0 release and update Dockerfile to now use 18.04

* Update the kubectl bin