Request ID is essential in operating OpenStack services, especially
when troubleshooting some API problems. It allows us to find out
the log lines actually related to a specific request.
However watcher api hasn't returned it properly, so operators had no
way to determine the exact ID they should search.
Add RequestID middleware to return the id in X-OpenStack-Request-Id
header, which is globally used.
Closes-Bug: #2122350
Change-Id: Ie4a8307e8e7e981cedbeaf5fe731dbd47a50bade
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>
