[FIX] sap.m.ComboBox: fix selection issue when the selectedKey property has the default value and the items' properties (models and bindingContext) are not propagated
[FIX] sap.m.ComboBox: fix selection issue when the selectedKey property
has the default value and the items' properties (models and
bindingContext) are not propagated

Change-Id: Ibf721878aa1065fcd9222fe39c18502e9d5926f2
BCP: 1580158561

nzamani/openui5,SAP/openui5,olirogers/openui5,nzamani/openui5,olirogers/openui5,olirogers/openui5,SAP/openui5,SAP/openui5,cschuff/openui5,SAP/openui5,cschuff/openui5,SQCLabs/openui5,nzamani/openui5,cschuff/openui5,SQCLabs/openui5,SQCLabs/openui5