[INTERNAL] sap.m.ComboBox: synchronously sets the selectedItem association when the parameter is a string
[INTERNAL] sap.m.ComboBox: synchronously sets the selectedItem
association when the parameter is a string

Change-Id: I3962dc8d21a242c1ac51498a42fe31f8263aa6c6

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