[test] Ensure modelview fetch succeeds

Give the fetch a timeout, and make sure all of
the data is collected before the timeout.

Change-Id: I439dd2029a95a56023598ede7e884cb6ed789c3b
Reviewed-by: Continuous Integration (KDAB) <build@kdab.com>
Reviewed-by: Björn Breitmeyer <bjoern.breitmeyer@kdab.com>