RTF import: fix as-char anchored OLE objects

Regression from 2a35f5c7945d00b6f6e21fc7cf5b05b184eba88f (DOCX OLE
import: inherit anchor type from replacement graphic, 2014-02-18), then
problem was that dmapper expected that the anchor type of the
replacement graphic is set, but the RTF tokenizer wasn't adapted to
fulfill this requirement.

(cherry picked from commit 43b88364b0b05def27899d585a1dab46ba3fb729)

Conflicts:
	sw/qa/extras/inc/swmodeltestbase.hxx
	sw/qa/extras/rtfimport/rtfimport.cxx

Change-Id: I0f7e1a71052f337793d6f844fe5476c3868c03f4
Reviewed-on: https://gerrit.libreoffice.org/10677
Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>