A few D.C. public schools may have been down to the wire when it came to completing renovations and repairs for the first day of school today, but parents at Garfield Elementary School can hardly blame DCPS for a water main break that shut the school down this morning. Repair work began at around 10 a.m. on a 12″ water main that broke at 22nd Street and Southern Ave. SE this morning, but in the…