[FIX] XMLComposite: Repairing of listeners for alternative types
[FIX] XMLComposite: Repairing of listeners for alternative types

Note:
The possibility that an aggregation is not a managed object (alt types)
was not taken into account.

Change-Id: I2009b74ac0d93585ef1c854723ef1022721d9e9e

SAP/openui5,SAP/openui5,SAP/openui5,SAP/openui5