[FIX] sap.m.IconTabBar: HCB theme clean up
[FIX] sap.m.IconTabBar: HCB theme clean up

Cleaning up the css styles according the new implementation
specification;

Change-Id: Iad4a7d23d262b5d35abdaa3c9006222cc24d7da9

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