This patch refactors the sample files of server_group notifications to
use a common ServerGroupPayload sample data.
Change-Id: I4e7531c180484a7b430d267153d185f1006543f0
Transform server group create notification to the versioned
notification framework.
Co-Authored-By: Gábor Antal <antal@inf.u-szeged.hu>
Change-Id: I781975293ccef40670cf474dd1d475cb427dba63
Implements: bp versioned-notification-transformation-queens
Előd Illés