At the beginning of The Nest (org.: Nid de guêpes), when Santino's crew drives in their car to prepare the robbery, Santino and Nasser start whistling the title melody of The Magnificent Seven and the rest of the crew joins them (and this whistled version is also played again at the beginning of the end credits). Apart from just being a very famous melody and the general purpose of loosening up the slightly stressed situation, is there any further meaning to this melody or any further connection to The Magnificent Seven and its story/motives in The Nest or this scene in particular?
(I should add that I haven't seen The Magnificent Seven and have only rough knowledge about its plot.)