public String getFullName() {
        return getFullName(null);
    }
Get the full name of this image, including the registry and tag
(e.g. <code>privateregistry:fabric8io/java:7u53</code>)

@return full name with the original registry and the original tag given (if any).
src/main/java/io/fabric8/maven/docker/util/ImageName.java