jmxRole configuration not inherited from parent when creating child container

Issue

• When creating a child container with a specified parent.
• That parent has a modified ${karaf_home}/etc/org.apache.karaf.management.cfg with the addition of jmxRole=jmxUser.
• The new child container does not inherit the modified ${karaf_home}/etc/org.apache.karaf.management.cfg.
• User has to manually add it to the org.apache.karaf.management.cfg of child container.
• Since the ${karaf_home}/etc/users.properties is in fact inherited by child containers, same way ${karaf_home}/etc/org.apache.karaf.management.cfg should also be likewise inherited.