Issue 50774 - Account.enroll_certificate() should not check for DS version
Bug Description:
`Account.enroll_certificate()` assumes that `userCertificate` can be added
only to `nsAccount` and does a check for DS version where this objectClass
was introduced.
But `userCertificate` is a valid attribute for `inetOrgPerson` objectClass
too. And `enroll_certificate()` can be used with this objectClass.
Fix Description:
Instead of relying on a DS version we should trust the server to add or
reject an invalid attribute.
Fixes: https://pagure.io/389-ds-base/issue/50774
Reviewed by: mhonek (Thanks!)