[INTERNAL] sap.m.GenericTile: improve stability of QUnit test
[INTERNAL] sap.m.GenericTile: improve stability of QUnit test

Change-Id: I8fd0d528e03de8b087cd8f6a0b94ef972e8098ef

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