Do not let a failed lookup pass for a failed delete

The check for whether the account went sat outside the try, so an error
reading it escaped instead of falling back to blanking the account.

confluent_server/aiohmi/redfish/oem/generic.py

@@ -795,11 +795,18 @@ class OEMHandler(object):
                     # that is for
                     break
             await asyncio.sleep(3)
-            # Uncached: a delete that failed left the account collection in the
-            # url cache as it was before, and answering this from that snapshot
-            # could only ever say the account is still there
-            if not await fishclient._account_url_info_by_id(uid, cache=False):
-                return True
+            try:
+                # Uncached: a delete that failed left the account collection in
+                # the url cache as it was before, and answering this from that
+                # snapshot could only ever say the account is still there
+                if not await fishclient._account_url_info_by_id(uid,
+                                                                cache=False):
+                    return True
+            except Exception:
+                # The check did not answer, which says nothing either way about
+                # the delete.  Ask again rather than letting the failure to
+                # look escape as though it were the failure to delete.
+                pass
         try:
             await fishclient.set_user_password(uid, base64.b64encode(os.urandom(15)))
             await fishclient.set_user_name(uid, '')