Dockerfile of the container that installs BMRA

This change adds a Dockerfile for building a container with
all the dependencies required to install BMRA. Currently, the
tooling uses a pre-built image, but this file can be useful
during troubleshooting issues.

Change-Id: Ibe086da10f3ece069327cee521af6f7fbe990a8f
Signed-off-by: Rihab Banday <rihab.banday@ericsson.com>
Reviewed-on: https://gerrit.opnfv.org/gerrit/c/kuberef/+/70838
Reviewed-by: Victor Morales <chipahuac@hotmail.com>
Reviewed-by: Georg Kunz <georg.kunz@est.tech>
Tested-by: Georg Kunz <georg.kunz@est.tech>