WASHINGTON — Bordering on dysfunction, Congress passed a one-week bill late Friday night to avert a partial shutdown of the Homeland Security Department, as leaders in both political parties quelled a revolt by House conservatives furious that the measure left President Barack Obama’s immigration policy intact. The final vote of a long day and night was a bipartisan 357-60 in the House, a little more than an hour after the Senate cleared the measure without so much as a roll call. U.S. Rep. Doug Collins, R-Gainesville, voted yes.