The new documentary by Dana Flor and Toby Oppenheimer about D.C.’s own Mayor for Life, The Nine Lives of Marion Barry, premieres on HBO tonight at 9 p.m. DCist caught the film when it debuted at SILVERDOCS earlier this summer, and overall the reviews have been a mixed bag. Critics already familiar with Barry and his lengthy history wanted more, while others were pretty much satisfied. You can be the judge for yourself tonight,…