test-lib: unset GIT_NOTES_REF to stop it from influencing tests
test-lib: unset GIT_NOTES_REF to stop it from influencing tests

Signed-off-by: Thomas Rast <18f23ef7096473d837b7404952f13710423b8b63@student.ethz.ch>
Acked-by: Johan Herland <759412786bc533369b22377bf83fb9056c5b25b2@herland.net>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git