ipa-kdb: set krbCanonicalName when creating new principals
Additionally, stop setting ipakrbprincipalalias attribute during principal
creation.
Part of https://fedorahosted.org/freeipa/ticket/3864
Reviewed-By: David Kupka <dkupka@redhat.com>
Reviewed-By: Simo Sorce <ssorce@redhat.com>