fix for test-fw-update

unit-tests/test-fw-update.py

@@ -24,15 +24,14 @@
         sys.exit(0)
     # Following will throw if no acroname module is found
     from rspy import device_hub
-    try:
-        devices.hub.discover()
-    except device_hub.NoneFoundError as e:
-        log.f( e )
+
+    if device_hub.create() is None:
+        log.f("No hub found")
     # Remove acroname -- we're likely running inside run-unit-tests in which case the
     # acroname hub is likely already connected-to from there and we'll get an error
     # thrown ('failed to connect to acroname (result=11)'). We do not need it -- just
     # needed to verify it is available above...
-    devices.acroname = None
+    devices.hub = None
 
 
 def send_hardware_monitor_command(device, command):