Description
The original docker-compose definition of the dockerized ozon cluster uses a more complex base image (flokkr/hadoop-runner) from the flokkr project (github.com/flokkr/flokkr)
This patch is to replace this image with a simplified version, which also includes the source of the script which converts the environment variables to hadoop XML format.
The simplified version is exactly the same which is proposed to be used as the baseimage of HADOOP-14898. The source is available from the HADOOP-14898 issue and the image is uploaded to the dockerhub (https://hub.docker.com/r/elek/hadoop-runner)
As it is the proposed base image for the official hadoop images, it will be easier to switch to apache/hadop-runner (when it will be merged).