By Eric Kelsey LOS ANGELES (Reuters) – The wrongful death lawsuit filed by the family of late pop star Michael Jackson against his concert promoter is now in the hands of a jury, and the verdict could have far-reaching implications for how the entertainment industry does business with its biggest stars. The 21-week trial, which has opened a window into the private life and last days of the King of Pop, has put not only concert promoter AEG Live on trial but also the entertainment industry's live-performance business model, analysts say. …