Do not report an interrupted firmware update as complete

The retry counter is there to ride out a few unanswered polls, but
exhausting it broke out of the loop with complete still unset and fell
through to the 'complete' return, so an SMM that stopped answering
part way through an apply was reported to the operator as updated.
Raise instead; a genuine finish still leaves the loop on the progress
reaching 100.

confluent_server/aiohmi/ipmi/oem/lenovo/nextscale.py

@@ -1029,7 +1029,7 @@ class SMMClient(object):
                 progdata, status, _ = await wc.grab_response_with_status('/data', 'get=fwProgress,fwUpdate')
             except Exception:
                 if tries > 2:
-                     break
+                    raise
                 tries += 1
                 continue
             if status != 200: