memory (sqlite): minor comment move

sat/memory/sqlite.py

@@ -127,12 +127,13 @@ NOT_IN_EXTRA = ('stanza_id', 'received_timestamp', 'update_uid') # keys which ar
 
 
 class ConnectionPool(adbapi.ConnectionPool):
-    # Workaround to avoid IntegrityError causing (i)pdb to be launched in debug mode
     def _runQuery(self, trans, *args, **kw):
         retry = kw.pop('query_retry', 6)
         try:
             trans.execute(*args, **kw)
         except sqlite3.IntegrityError as e:
+            # Workaround to avoid IntegrityError causing (i)pdb to be
+            # launched in debug mode
             raise failure.Failure(e)
         except Exception as e:
             # FIXME: in case of error, we retry a couple of times