Add note about can_send_version()

Change-Id: Ib5710703a53da0577a6c534bb44218df1df16805
Check for return value in client serializer test

Change-Id: If4b1e69456c50c3e8a88b654015c2cab000976a2
Add RPCDispatcher tests

Change-Id: I856fbe1b271b3d24e5b343e4460ddcb8e8ebc0ce