textmarc2xmlmarc: double sysno/recid fix
textmarc2xmlmarc: double sysno/recid fix

* When a text-marc file contains a '001__' tag, the tag will no longer get
  transformed to the MARCXML result if its equal to its sysno.
  Eliminating cases where the '001__' controlfield appears twice in the
  MARCXML result.

inveniosoftware/invenio,tiborsimko/invenio,tiborsimko/invenio,inveniosoftware/invenio