t7700-repack: repack -a now works properly, expect success from test

Since the recent rework of the object listing mechanism of
pack-objects/rev-list, git-repack now properly packs objects from alternate
repositories even when the local repository contains packs.

Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t7700-repack.sh

@@ -69,7 +69,7 @@ test_expect_success 'packed obs in alt ODB are repacked even when local repo is
 	done
 '
 
-test_expect_failure 'packed obs in alt ODB are repacked when local repo has packs' '
+test_expect_success 'packed obs in alt ODB are repacked when local repo has packs' '
 	rm -f .git/objects/pack/* &&
 	echo new_content >> file1 &&
 	git add file1 &&