ASACORE-985 Remaining work necessary for the AllJoyn C API callbacks calling convention (unit-tests)

Change-Id: I698ac5777306de04524999409a450b90fb97e871
Signed-off-by: Marius Niculescu <mariusni@microsoft.com>
Merge "ASACORE-985 Remaining work necessary for the AllJoyn C API callbacks calling convention (unit-tests)"