Test for interest propagation with GWs and Hub leafnodes
Test for interest propagation with GWs and Hub leafnodes

Setup:

  B <- GW -> C
 /            \
v              v
A              D

Leafnodes are created from B to A and C to D. The remotes on B and
C have the option "Hub: true".

The replier connects to D and listens to "service". The requestor
connects to "A" and sends the request on "service". The reply does
not make it back to A.
If the requestor on A, instead of calling Request(), first creates
a subscription on an inbox, wait a little bit (few 100s ms), then
publishes the request on "service" with that inbox for the reply
subject, the reply makes it back to A.

Signed-off-by: Ivan Kozlovic <a15f8b81a160b4eebe5c84e9e3b65c87b9b2f18e@synadia.com>

wallyqs/gnatsd,wallyqs/gnatsd