Spring Avoid unnecessary sorting overhead

Hi,

this PR avoids some unnecessary sorting overhead (e.g. if the collection is too small) for methods that are repeatably called and where collection sizes of <= 1 are fairly common (e.g. for the ProducesRequestCondition).

Cheers, Christoph

Comment From: rstoyanchev

Thanks for the changes. It's a shame this check isn't in Collections#sort or List#sort.

Comment From: dreis2211

Indeed