Fixes Reference handling

* Adding a SM to an AAS was using wrong Reference
* Adding a SM using the VABMultiSubmodelProvider was not updating the refs in the AAS

Change-Id: Iabf244c9fde8b4ea69ea8537cbc17959f3d38715
Signed-off-by: Frank Schnicke <frank.schnicke@iese.fraunhofer.de>
6 files changed