Comment 2 for bug 1602517

The problem is "difficult to investigate the trouble" without this information for operator view.
  (Since unified ID info is helpful for cross module investigation)

Currently x-openstack-request-id support status is varied.
In command line, some commands are supported and some are not supported.
As for manager, most of modules are supported already (by req-xxxxxx: xxxxx is x-openstack-request-id).
but some are not (for example swift is x-trans-id at this moment.)

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