Add the function to log 'x-openstack-request-id' or
'x-compute-request-id' in each API call.
If the caller (e.g. heat) uses oslo.log,
the caller's request id in oslo.context and
the callee's request id can be output in the same
log message (same line).
Change-Id: I29312ce278ecfae41a688a0ddf76c24cfa0eaf6b
Implements: blueprint log-request-id