resolve fdo#53594 : Import RTF file but ole are not well positioned in
table/cells

If the OLE object is in a container, don't try to import it as
OLE object (use the \objdata element) but use the \result element which
is the appareance of the object (it's a picture).

Change-Id: Id97b36ce89beae02885cf82383321c14b58f2ea5
Reviewed-on: https://gerrit.libreoffice.org/2243Reviewed-by: Miklos Vajna <vmiklos@suse.cz>
Tested-by: Miklos Vajna <vmiklos@suse.cz>