generated python-multihost config uses the same password for directory manager and admin

[pvoborni]

This is problematic because then the tests might not uncover bugs when IPA installer uses the passwords wrongly.

https://github.com/freeipa/freeipa-pr-ci/blob/master/ansible/roles/machine/provision/templates/ipa-test-config.yaml#L4

Changing the passwords in PR-CI is a trivial change but be aware! Some tests might be written with the incorrect assumtion that the passwords are the same so after changing it, some tests might start failing thus fixing it should be ideally coordinated with freeipa, probably done in parallel infra first.