public String getConfigProperty(String propertyName, String defaultValue) {
        return getConfig().getString(propertyName, defaultValue);
    }
Returns the given configuration property name or the provided default
value if not found.
@param propertyName the property name
@param defaultValue the default value
@return the config property
gateway/platforms/war/src/main/java/io/apiman/gateway/platforms/war/WarEngineConfig.java