QtIFW

Make it possible to register the Repository class independently.

Fixes for example invalid repository entries inside the config
files after streaming the type as QVariant over the connection
and recreating it client or server-side.

Task-number: QTIFW-569
Change-Id: Ide328d1e6f73ff538a1b107fcc915e0a260cce24
Reviewed-by: Christoph Vogtländer <c.vogtlaender@sigma-surface-science.com>
Reviewed-by: Niels Weber <niels.weber@digia.com>