send_database_status uses the inner structure

cassandra_compaction_task without initializing,
the fix takes care of that.
Closes-Bug: #1588156

Change-Id: Ied936db6ffa6b23c86d4f6a76680d9a550fee89f

src/nodemgr/database_nodemgr/database_event_manager.py

@@ -253,6 +253,7 @@ def database_periodic(self):
     def send_database_status(self):
         cassandra_status_uve = CassandraStatusUVE()
         cassandra_status = CassandraStatusData()
+        cassandra_status.cassandra_compaction_task = CassandraCompactionTask()
         # Get compactionstats
         compaction_count = subprocess.Popen(["nodetool", "compactionstats"],
             stdout=subprocess.PIPE, stderr=subprocess.PIPE)