Change woocommerce product addons position in the product page

For anyone wanting to do this outside of the plugin, to future proof this from updates, you can use the global var in place of the $this

add_action( 'woocommerce_after_add_to_cart_button', array(  $GLOBALS['Product_Addon_Display'], 'display' ), 10 );
add_action( 'woocommerce_before_add_to_cart_button', array(  $GLOBALS['Product_Addon_Display'], 'totals' ), 20 );