Instead of creating a new cache for every collector we now use a
collector dispatcher which is dispatching the request to different
collectors.
Tsk-number: QDS-7258
Change-Id: I024622d4b757e1ff10f7cab4204d1742ef5926da
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>
