D.C. officials are apparently stunned to find that the money they’ve spent on the new Nationals stadium isn’t translating into the sort of unconditional loyalty they might like. Turns out the team’s 2008 Dream Foundation Dream Gala (it’s dream-related, see) will be held at National Harbor in Prince George’s County, Md., and the Examiner reports that Mayor Adrian Fenty, D.C. Council Chair Vincent Gray and just about every other D.C. leader is throwing a temper…