Move git-hash-object tests from t5303 to t1007

This is a more appropriate location according to t/README.

Signed-off-by: Adam Roben <aroben@apple.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t5303-hash-object.sh b/t/t1007-hash-object.sh
similarity index 100%
rename from t/t5303-hash-object.sh
rename to t/t1007-hash-object.sh