Comment 5 for bug 1784074

I have come up with all of the following stacktraces that can result in us being in a weird state

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2018-06-24 07:02:42.747 10473 ERROR nova.api.openstack.wsgi File "/openstack/venvs/nova-17.0.3/lib/python2.7/site-packages/nova/compute/api.py", line 1867, in _delete
2018-06-24 07:02:42.747 10473 ERROR nova.api.openstack.wsgi instance.save()
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2018-06-27 14:41:01.211 10474 ERROR nova.api.openstack.wsgi File "/openstack/venvs/nova-17.0.3/lib/python2.7/site-packages/nova/compute/api.py", line 2113, in _do_delete
2018-06-27 14:41:01.211 10474 ERROR nova.api.openstack.wsgi instance.save()
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2018-07-09 11:45:37.280 10468 ERROR nova.api.openstack.wsgi File "/openstack/venvs/nova-17.0.3/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 5738, in action_start
2018-07-09 11:45:37.280 10468 ERROR nova.api.openstack.wsgi action_ref.save(context.session)
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2018-07-13 12:42:11.250 10466 ERROR nova.api.openstack.wsgi File "/openstack/venvs/nova-17.0.3/lib/python2.7/site-packages/nova/compute/api.py", line 937, in _provision_instances
2018-07-13 12:42:11.250 10466 ERROR nova.api.openstack.wsgi inst_mapping.create()
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2018-07-20 09:41:34.312 10473 ERROR nova.api.openstack.wsgi File "/openstack/venvs/nova-17.0.3/lib/python2.7/site-packages/nova/compute/api.py", line 925, in _provision_instances
2018-07-20 09:41:34.312 10473 ERROR nova.api.openstack.wsgi build_request.create()
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2018-07-20 09:45:29.905 10465 ERROR nova.api.openstack.wsgi File "/openstack/venvs/nova-17.0.3/lib/python2.7/site-packages/nova/objects/instance_mapping.py", line 80, in _create_in_db
2018-07-20 09:45:29.905 10465 ERROR nova.api.openstack.wsgi db_mapping.save(context.session)
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2018-07-20 11:08:13.265 10479 ERROR nova.api.openstack.wsgi File "/openstack/venvs/nova-17.0.3/lib/python2.7/site-packages/nova/compute/api.py", line 901, in _provision_instances
2018-07-20 11:08:13.265 10479 ERROR nova.api.openstack.wsgi req_spec.create()
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2018-07-24 08:42:27.400 10468 ERROR nova.api.openstack.wsgi File "/openstack/venvs/nova-17.0.3/lib/python2.7/site-packages/nova/objects/build_request.py", line 184, in _create_in_db
2018-07-24 08:42:27.400 10468 ERROR nova.api.openstack.wsgi db_req.save(context.session)
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