warn and skip test nodes on busy ports

TODO: We might want to still generate the right amount

Signed-off-by: Csaba Kiraly <csaba.kiraly@gmail.com>

tests/dht/test_providers.nim

@@ -33,12 +33,16 @@ proc bootstrapNodes(
 
   debug "---- STARTING BOOSTRAPS ---"
   for i in 0..<nodecount:
+    try:
       let privKey = PrivateKey.example(rng)
       let node = initDiscoveryNode(rng, privKey, localAddress(20302 + i), bootnodes)
       await node.start()
       result.add((node, privKey))
       if delay > 0:
         await sleepAsync(chronos.milliseconds(delay))
+    except TransportOsError as e:
+      echo "skipping node ",i ,":", e.msg
+
 
 
   #await allFutures(result.mapIt(it.bootstrap())) # this waits for bootstrap based on bootENode, which includes bonding with all its ping pongs