Last year’s celebration of the 100th birthday of Dmitri Shostakovich, on September 25, fizzled out somewhat here in Washington. This week, dedicated listeners had the chance to take their fill of the Russian composer’s music. After a thundering concert performance of Lady Macbeth of Mtsensk by the Kirov Opera on Sunday, it was the Emerson Quartet who brought the early half of their complete cycle of Shostakovich’s fifteen string quartets, played to great acclaim in…