industrial tests do not know how to delete an azure controller

[Curtis Hovey]

As seen in
    http://juju-ci.vapour.ws/view/Weekly/job/industrial-test-azure/132/consoleFull

The test is attempting to delete the controller to test a restore, but it gets the wrongly identifies instance. Our scripts to instrument failure fail because the instance is not found by the substratre/winazurearm query of azure.

2016-09-15 17:44:12 INFO State-Server backup at /mnt/jenkins/workspace/industrial-test-azure/juju-backup-20160915-174327.tar.gz
2016-09-15 17:44:13 INFO Starting new HTTPS connection (1): management.core.windows.net
2016-09-15 17:44:13 ERROR Not Found
<Error xmlns="http://schemas.microsoft.com/windowsazure" xmlns:i="http://www.w3.org/2001/XMLSchema-instance"><Code>ResourceNotFound</Code><Message>The hosted service does not exist.</Message></Error>
Traceback (most recent call last):
  File "/mnt/jenkins/juju-ci-tools/deploy_stack.py", line 765, in runtime_context
    yield
  File "/mnt/jenkins/juju-ci-tools/industrial_test.py", line 916, in _iter_bs_manager_steps
    for result in attempt.iter_steps(client):
  File "/mnt/jenkins/juju-ci-tools/industrial_test.py", line 787, in iter_steps
    terminate_instances(controller_client.env, [instance_id])
  File "/mnt/jenkins/juju-ci-tools/substrate.py", line 70, in terminate_instances
    return substrate.terminate_instances(instance_ids)
  File "/mnt/jenkins/juju-ci-tools/substrate.py", line 430, in terminate_instances
    with self.terminate_instances_cxt(instance_ids):
  File "/usr/lib/python2.7/contextlib.py", line 17, in __enter__
    return self.gen.next()
  File "/mnt/jenkins/juju-ci-tools/substrate.py", line 397, in terminate_instances_cxt
    service, embed_detail=True)
  File "/usr/local/lib/python2.7/dist-packages/azure/servicemanagement/servicemanagementservice.py", line 341, in get_hosted_service_properties
    HostedService)
  File "/usr/local/lib/python2.7/dist-packages/azure/servicemanagement/servicemanagementclient.py", line 365, in _perform_get
    response = self.perform_get(path, x_ms_version)
  File "/usr/local/lib/python2.7/dist-packages/azure/servicemanagement/servicemanagementclient.py", line 175, in perform_get
    response = self._perform_request(request)
  File "/usr/local/lib/python2.7/dist-packages/azure/servicemanagement/servicemanagementclient.py", line 339, in _perform_request
    return _management_error_handler(ex)
  File "/usr/local/lib/python2.7/dist-packages/azure/servicemanagement/servicemanagementclient.py", line 419, in _management_error_handler
    return _general_error_handler(http_error)
  File "/usr/local/lib/python2.7/dist-packages/azure/servicemanagement/_common_error.py", line 34, in _general_error_handler
    raise AzureHttpError(message, http_error.status)
AzureMissingResourceHttpError: Not Found
<Error xmlns="http://schemas.microsoft.com/windowsazure" xmlns:i="http://www.w3.org/2001/XMLSchema-instance"><Code>ResourceNotFound</Code><Message>The hosted service does not exist.</Message></Error>
2016-09-15 17:44:14 INFO juju --show-log show-status -m parallel-azure-old:controller --format yaml