[FIX] sap.m.IconTabBar: IconTabHeader is not invalidated when the same value is set to a property
[FIX] sap.m.IconTabBar: IconTabHeader is not invalidated when the same value is set to a property

Change-Id: Ib7c4fdb3d463e6088dbd28d19c5981a33c45978d
BCP: 1570788658

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