Fix kasp test set_keytime

Fix kasp test set_keytime

While the creation and publication times of the various keys
in this policy are nearly at the same time there is a chance that
one key is created a second later than the other.

The `set_keytimes_algorithm_policy` mistakenly set the keytimes
for KEY3 based of the "published" time from KEY2.

(cherry picked from commit 24e07ae98e02858bf677fdbe3c4fd5112b502cae)