LFSPointerTest: Open ByteArrayOutputStream in try-with-resource

Change-Id: Ib15a838e735f8b960e0ed635d6d9b0caf97f4791
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit.lfs.test/tst/org/eclipse/jgit/lfs/lib/LFSPointerTest.java

@@ -61,11 +61,12 @@ public class LFSPointerTest {
 		final String s = "27e15b72937fc8f558da24ac3d50ec20302a4cf21e33b87ae8e4ce90e89c4b10";
 		AnyLongObjectId id = LongObjectId.fromString(s);
 		LfsPointer ptr = new LfsPointer(id, 4);
-		ByteArrayOutputStream baos = new ByteArrayOutputStream();
+		try (ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
 			ptr.encode(baos);
-		baos.close();
-		assertEquals("version https://git-lfs.github.com/spec/v1\noid sha256:"
+			assertEquals(
+					"version https://git-lfs.github.com/spec/v1\noid sha256:"
 							+ s + "\nsize 4\n",
 					baos.toString(UTF_8.name()));
 		}
 	}
+}