Task #9607: do du on completing event

SAS/DataManagement/StorageQueryService/cache.py

@@ -48,7 +48,7 @@ class CacheManager:
                                              numthreads=2)
 
         self.otdb_listener.onObservationAborted = self.onObservationAborted
-        self.otdb_listener.onObservationFinished = self.onObservationFinished
+        self.otdb_listener.onObservationCompleting = self.onObservationCompleting
 
         self.dm_listener = DataManagementBusListener(busname=dm_notification_busname,
                                                      subjects=dm_notification_prefix + '*',
@@ -322,7 +322,7 @@ class CacheManager:
     def __exit__(self, exc_type, exc_val, exc_tb):
         self.close()
 
-    def onObservationFinished(self, otdb_id, modificationTime):
+    def onObservationCompleting(self, otdb_id, modificationTime):
         self._onDiskActivityForOTDBId(otdb_id)
 
     def onObservationAborted(self, otdb_id, modificationTime):