ipa-otptoken-import: Make PBKDF2 refer to the pkcs5 namespace
    
    For some unknown reason, when I wrote the ipa-otptoken-import script
    I used bad input data which had the PBKDF2 parameters in the wrong
    XML namespace. I have corrected this input data to match RFC 6030.
    
    https://pagure.io/freeipa/issue/7035
    
    Signed-off-by: Nathaniel McCallum <npmccallum@redhat.com>
    Reviewed-By: Martin Basti <mbasti@redhat.com>
    Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>