selftest: Run test of how userPassword / crypt() style passwords are stored in quicktest

This ensures that the crypt_r()/crypt_rn()/crypt() behaviour is tested in all
the samba-o3 builds and so is checked on RHEL7 in GitLab CI.

https://bugzilla.samba.org/show_bug.cgi?id=14424

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Alexander Bokovoy <ab@samba.org>
(cherry picked from commit cabf873b)
40 jobs for abartlet/crypt_r-v4-12 in 64 minutes and 52 seconds (queued for 2 seconds)
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