WIP: OMNL compliance console, relay rpc pool, zedxion relay service

services/relay/src/MessageQueue.js

@@ -220,6 +220,7 @@ export class MessageQueue {
       queueSize: this.queue.length,
       processed: this.processed.size,
       failed: this.failed.size,
+      inFlight: this.inFlight.size,
       persistenceEnabled: this.persistenceEnabled,
       lastPersistedAt: this.lastPersistedAt
     };