public String initAndValidate(ConfigHelper.NameFormatter nameFormatter, Logger log) {
        name = nameFormatter.format(name);
        String minimalApiVersion = null;
        if (build != null) {
            minimalApiVersion = build.initAndValidate(log);
            build.initTags(nameFormatter);
        }
        if (run != null) {
            minimalApiVersion = EnvUtil.extractLargerVersion(minimalApiVersion, run.initAndValidate());
        }
        return minimalApiVersion;
    }
Override externalConfiguration when defined via special property.

@param externalConfiguration Map with alternative config
src/main/java/io/fabric8/maven/docker/config/ImageConfiguration.java