[INTERNAL][FIX] sap.m.Toolbar: Testsuite sample corrected
[INTERNAL][FIX] sap.m.Toolbar: Testsuite sample corrected

BCP: 1970240663
-selects in the sample had equal keys for all items, causing wrong
selection

Change-Id: Id893197f0f167791263a12d26389e16d6b3f0f46

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