Former Hawks swingman Josh Childress is headed back to Greece for a second season.  Josh Childress is going back to Greece.   The former Hawks swingman said he is returning to Olympiakos for the 2009-10 season and will not opt out of his contract and return to the NBA.   “I still have some unfinished business to tend to,” Childress said by phone early Tuesday morning. “I definitely have unfinished business in Greece.”   Childress had a Wednesday deadline to notify Olympiakos of his intentio...