@Override
    public <T extends AbstractConfig> T getConfigObject(final Class<T> clazz) {
        final T config = super.getConfigObject(clazz);
        return mapConfigValue(clazz, config);
    }
Intercepts any calls to getConfigObject and allows the returned values to be replaced
with different values for testing.
stroom-app/src/test/java/stroom/test/ConfigMapperSpy.java