In the current solution the RMR allocates the buffer always to max size of the base requested size (64K) and if we allocate this size all messages will be with this size if we work with one buffer per thread and no allocations (for speed reason).

Technically make this a compile-time parameter that we set to 1MB now. Test with a 1MB message and whether 1MB message can be successfully received by an sample xApp.

Ask from simulator to be able to send large message.

Note that the RMR work for this is under a separate epic: RIC-309