Update script and other references using container names (#90)

* Update run_nwaku script to handle either container name format

* Update rest-traffic image version

Author: stubbsta

docker-compose.yml

@@ -98,9 +98,9 @@ services:
       - simulation
 
   rest-traffic:
-    image: alrevuelta/rest-traffic:6992bb5
+    image: alrevuelta/rest-traffic:28430f8
     command:
-      --multiple-nodes=http://waku-simulator_nwaku_[1..${NUM_NWAKU_NODES:-5}]:8645
+      --multiple-nodes=http://waku-simulator-nwaku-[1..${NUM_NWAKU_NODES:-5}]:8645
       --msg-size-kbytes=${MSG_SIZE_KBYTES:-10}
       --delay-seconds=${TRAFFIC_DELAY_SECONDS:-15}
     networks: