Instance will not boot if image is deleted.

Issue

• Unable to boot multiple instances
• Instance's image was deleted and now it will not boot
• Nova image cache or ImageCache
• /nova/nova-compute.log
• instance backing file
• instance backing disk
• instance _base

2016-02-18 11:21:56.770 3275 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/image/api.py", line 182, in download
2016-02-18 11:21:56.770 3275 TRACE oslo_messaging.rpc.dispatcher     dst_path=dest_path)
2016-02-18 11:21:56.770 3275 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/image/glance.py", line 351, in download
2016-02-18 11:21:56.770 3275 TRACE oslo_messaging.rpc.dispatcher     _reraise_translated_image_exception(image_id)
2016-02-18 11:21:56.770 3275 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/image/glance.py", line 349, in download
2016-02-18 11:21:56.770 3275 TRACE oslo_messaging.rpc.dispatcher     image_chunks = self._client.call(context, 1, 'data', image_id)
2016-02-18 11:21:56.770 3275 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/image/glance.py", line 218, in call
2016-02-18 11:21:56.770 3275 TRACE oslo_messaging.rpc.dispatcher     return getattr(client.images, method)(*args, **kwargs)
2016-02-18 11:21:56.770 3275 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/glanceclient/v1/images.py", line 143, in data
2016-02-18 11:21:56.770 3275 TRACE oslo_messaging.rpc.dispatcher     % urlparse.quote(str(image_id)))
2016-02-18 11:21:56.770 3275 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/glanceclient/common/http.py", line 262, in get
2016-02-18 11:21:56.770 3275 TRACE oslo_messaging.rpc.dispatcher     return self._request('GET', url, **kwargs)
2016-02-18 11:21:56.770 3275 TRACE oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/glanceclient/common/http.py", line 230, in _request
2016-02-18 11:21:56.770 3275 TRACE oslo_messaging.rpc.dispatcher     raise exc.from_response(resp, resp.text)
2016-02-18 11:21:56.770 3275 TRACE oslo_messaging.rpc.dispatcher ImageNotFound: Image d7066af1-2e0c-4028-8a47-4e69f8a7a9b6 could not be found