AMQ Broker Init Image has 945 MiB size.

Artifacts I have tested: registry-proxy.engineering.redhat.com/rh-osbs/amq-broker-7-amq-broker-77-init:0.2-2

The output of investigation issue:

• attachment amq-broker-7-amq-broker-77-init_0.2-2.json (dive tool)
• 

Reason

After investigation and look to .dockerfile we have missed any yum cleanup.

RUN yum install -y git

RUN yum install -y rh-python36 rh-python36-python-jinja2 rh-python36-PyYAML

Instead of the best practices: 

RUN yum install -y git && \
    yum clean all && \
    rm -rf /var/cache/yum

RUN yum install -y rh-python36 rh-python36-python-jinja2 rh-python36-PyYAML && \
    yum clean all && \
    rm -rf /var/cache/yum

In the future, we can prevent this by rewrite Dockerfile to CEKIT