GitSmartHttpTools: Open OutputStream in try-with-resource

Change-Id: Ifb50b923f58f73d323cc1492950e58b6dc39f376
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit.http.server/src/org/eclipse/jgit/http/server/GitSmartHttpTools.java

@@ -314,11 +314,8 @@ public class GitSmartHttpTools {
 		res.setStatus(HttpServletResponse.SC_OK);
 		res.setContentType(type);
 		res.setContentLength(buf.length);
-		OutputStream os = res.getOutputStream();
-		try {
+		try (OutputStream os = res.getOutputStream()) {
 			os.write(buf);
-		} finally {
-			os.close();
 		}
 	}