[INTERNAL] sap.m.ComboBox: QUnit-tests added
[INTERNAL] sap.m.ComboBox: QUnit-tests added

Change-Id: Ia4281f9756a6c5ec4ced417312da1949add77ca0

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