[INTERNAL] sap.m.TabContainer: qUnit adaptation
[INTERNAL] sap.m.TabContainer: qUnit adaptation

Change-Id: Iaac6396ed8ebef2649dbd3d6af70be62c6f86514

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