[FIX] sap.m.TileContainer - Simplify Test Page

Update Page.view.xml

http://stackoverflow.com/questions/25051263/sapui5-tile-container-not-working

Tile Container was not working in original version:

replaced tiles="{ path: '/TileCollection' }" with
tiles="{/TileCollection}"

Change-Id: I0b4d0ef55a3fe9799813258277cc7d214133c569