[INTERNAL] sap.m.ComboBox: upgrade unit test to QUnit 2.x
[INTERNAL] sap.m.ComboBox: upgrade unit test to QUnit 2.x

Change-Id: I8fc5210f5a95fca93b278fca35c4a78407e3d30c

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