t5562: pass object-format in synthesized test data
Ensure that we pass the object-format capability in the synthesized test
data so that this test works with algorithms other than SHA-1.
In addition, add an additional test using the old data for when we're
using SHA-1 so that we can be sure that we preserve backwards
compatibility with servers not offering the object-format capability.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>