INVOCATION request ID is not session scope

[ecorm]

The WAMP spec mandates that INVOCATION.Request be a session scope ID. However, in Crossbar the same ID generator is used by the Dealer class for all callee sessions. See

crossbar/crossbar/router/dealer.py

Line 955 in 03d7057

invocation_request_id = self._request_id_gen.next()

If generating INVOCATION request IDs on a per-session basis is deemed too costly, then it's the WAMP spec that should changed to loosen those requirements.