The last two weeks, I went to see movies that were squarely in the comedy category, including “Wanderlust” and “Friends with Kids.” So when I went to see “21 Jump Street” this weekend I thought that the good comedy streak might run out. While the movie had its funny moments – including some tongue-in-cheek nods to the series on which it is based – there were not many jokes that were not featured prominently in the trailer.