Comment 0 for bug 1847821

```
2019-10-11 14:15:11.727 8 WARNING blazar.utils.openstack.nova [-] Removing hosts added to aggregate 34838: [u'eddfa86d-f879-4114-9876-bc716411a2ce']: HostNotInFreePool: Host f9995c9d-fc60-4f20-a206-76b9b8
d9eda2 not in freepool 'freepool'
2019-10-11 14:15:12.055 8 WARNING blazar.utils.openstack.nova [-] Adding hosts back to freepool: [u'eddfa86d-f879-4114-9876-bc716411a2ce']: HostNotInFreePool: Host f9995c9d-fc60-4f20-a206-76b9b8d9eda2 not
 in freepool 'freepool'
2019-10-11 14:15:12.461 8 ERROR blazar.status [-] Lease 36836677-dfaf-48b4-9e1e-cf62ca6c2754 went into ERROR status: Aggregate freepool could not be found. (HTTP 404) (Request-ID: req-2ce0dd30-032a-494e-9
216-52df65ec0f2f): NotFound: Aggregate freepool could not be found. (HTTP 404) (Request-ID: req-2ce0dd30-032a-494e-9216-52df65ec0f2f)
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service [-] Error occurred while handling start_lease event for lease 36836677-dfaf-48b4-9e1e-cf62ca6c2754.: NotFound: Aggregate freepool could not be found.
 (HTTP 404) (Request-ID: req-2ce0dd30-032a-494e-9216-52df65ec0f2f)
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service Traceback (most recent call last):
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service File "/var/lib/kolla/venv/lib/python2.7/site-packages/blazar/manager/service.py", line 248, in _exec_event
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service event_fn(lease_id=event['lease_id'], event_id=event['id'])
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service File "/var/lib/kolla/venv/lib/python2.7/site-packages/blazar/status.py", line 235, in wrapper
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service {'status': cls.ERROR})
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service File "/var/lib/kolla/venv/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service self.force_reraise()
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service File "/var/lib/kolla/venv/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service six.reraise(self.type_, self.value, self.tb)
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service File "/var/lib/kolla/venv/lib/python2.7/site-packages/blazar/status.py", line 219, in wrapper
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service result = func(*args, **kwargs)
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service File "/var/lib/kolla/venv/lib/python2.7/site-packages/blazar/manager/service.py", line 638, in start_lease
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service status.reservation.ACTIVE)
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service File "/var/lib/kolla/venv/lib/python2.7/site-packages/blazar/manager/service.py", line 668, in _basic_action
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service reservation['resource_id']
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service File "/var/lib/kolla/venv/lib/python2.7/site-packages/blazar/plugins/oshosts/host_plugin.py", line 215, in on_start
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service pool.add_computehost(host_reservation['aggregate_id'], hosts)
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service File "/var/lib/kolla/venv/lib/python2.7/site-packages/blazar/utils/openstack/nova.py", line 392, in add_computehost
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service self.nova.aggregates.add_host(freepool_agg.name, host)
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service File "/var/lib/kolla/venv/lib/python2.7/site-packages/novaclient/v2/aggregates.py", line 84, in add_host
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service body, "aggregate")
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service File "/var/lib/kolla/venv/lib/python2.7/site-packages/novaclient/base.py", line 366, in _create
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service resp, body = self.api.client.post(url, body=body)
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service File "/var/lib/kolla/venv/lib/python2.7/site-packages/keystoneauth1/adapter.py", line 334, in post
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service return self.request(url, 'POST', **kwargs)
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service File "/var/lib/kolla/venv/lib/python2.7/site-packages/novaclient/client.py", line 83, in request
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service raise exceptions.from_response(resp, body, url, method)
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service NotFound: Aggregate freepool could not be found. (HTTP 404) (Request-ID: req-2ce0dd30-032a-494e-9216-52df65ec0f2f)
2019-10-11 14:15:12.559 8 ERROR blazar.manager.service
```