[INTERNAL][FIX] sap.m.ComboBoxBase: do not bypass aggregation forwarding
[INTERNAL][FIX] sap.m.ComboBoxBase: do not bypass aggregation forwarding

Change-Id: Ibc2e015bec36d5cb7a2a16765abfa9261c496a6e

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