Add sensor to operators (#414)

Sensors are not part of the plugin API in airflow 1.9

dags/dataset_alerts.py

@@ -1,6 +1,6 @@
 from airflow import DAG
 from datetime import datetime, timedelta
-from airflow.sensors.s3fs_check_success import S3FSCheckSuccessSensor
+from airflow.operators.s3fs_check_success import S3FSCheckSuccessSensor
 from airflow.operators.dataset_status import DatasetStatusOperator
 
 default_args = {

plugins/s3fs_check_success.py

@@ -58,5 +58,4 @@ class S3FSCheckSuccessSensor(BaseSensorOperator):
 
 class S3FSCheckSuccessPlugin(AirflowPlugin):
     name = "s3fs_check_success"
-    operators = [S3FSCheckSuccessOperator]
-    sensors = [S3FSCheckSuccessSensor]
+    operators = [S3FSCheckSuccessOperator, S3FSCheckSuccessSensor]