The following are done to avoid travis-ci failing due to too much log
size.
1) Update Makefile and scripts to make go build less verbose.
2) Make tdnf less verbose
This change involves using non-root user to run the process of the
docker images. Also made update in Dockerfile to make the containers
support "read-only" and introduce "HEALTHCHECK". Note the "read-only"
options are not enabled in docker-compose, to cover the very corner
case when user wants to update the container filesystem manually.
Remove read only option from docker-compose template by default
