Look elsewhere when the manager publishes no log services

The early return sat before the fallback, so the one layout it was
written for was the one it could not reach.

confluent_server/aiohmi/redfish/oem/generic.py

@@ -611,9 +611,10 @@ class OEMHandler(object):
 
     async def get_event_log(self, clear=False, fishclient=None, extraurls=[]):
         bmcinfo = await self._do_web_request(await fishclient.get_bmcurl())
+        # A manager need not publish log services at all, and one that does not
+        # is the clearest case of a platform keeping its event log elsewhere, so
+        # carry on to the fallback below rather than answering with nothing
         lsurl = bmcinfo.get('LogServices', {}).get('@odata.id', None)
-        if not lsurl:
-            return
         currtime = bmcinfo.get('DateTime', None)
         correction = timedelta(0)
         utz = tz.tzoffset('', 0)
@@ -644,7 +645,7 @@ class OEMHandler(object):
                     found.append(candidate)
             return found
 
-        lurls = await eventlogurls(lsurl)
+        lurls = await eventlogurls(lsurl) if lsurl else []
         if not lurls or not clear:
             # Some implementations keep no event log under the manager and put
             # it under the system instead, so fall back to looking there rather