Fix panic on influx shutdown.

Influx was shutdown before Poseidon was terminated. In that mean time the Profiling data has been written. Also in that mean time, a periodical influx event triggers a panic since influx is already shutdown.

We implemented two changes, each fixing this scenario.

cmd/poseidon/main.go

@@ -215,12 +215,12 @@ func main() {
 	initSentry(&config.Config.Sentry, config.Config.Profiling.Enabled)
 	defer shutdownSentry()
 
-	stopProfiling := initProfiling(config.Config.Profiling)
-	defer stopProfiling()
-
 	cancel := monitoring.InitializeInfluxDB(&config.Config.InfluxDB)
 	defer cancel()
 
+	stopProfiling := initProfiling(config.Config.Profiling)
+	defer stopProfiling()
+
 	server := initServer()
 	go runServer(server)
 	shutdownOnOSSignal(server)