fix ldap nixos test

passwords were replaced with salted sha1 instead of sha256, because I don't want to have to figure out how to make slapd load this module

We could also just do {CLEARTEXT} for the purpose of this test

Created by  ajs124  on August 28, 2021
4NA42NTFNS5GJJSMATNNCZ6QP6FXV3S4BJNNJWLU6QW6WYO262CQC
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