Fix some IDE warnings

(cherry picked from commit 8fc3cfa56d)

server/handlers/api/alerts.py

@@ -143,7 +143,7 @@ class APIAlertsStreamHandler(tornado_eventsource.handler.EventSourceHandler):
                 if self._alert_queue not in self._sse_alert_queues:
                     logging.error("Web server cleared up a queue of an active connection!")
                     self.close()
-        except:
+        except Exception as e:
             logging.warning("Exception in SSE callback, connection will be closed: %s", e, exc_info=True)
             self.close()