The API service used to log access requests, as is customary for API
services. However, commit c4bd20ebd4b42201bf40e00d4f0a1b2c69d2e931
unintentionally changed this behavior when changing over to use
oslo_service.
This commit causes ironic-api to resume logging access requests, now
with all the additional information that oslo_service provides, by
changing the logger_name to the service name (instead of the default,
which was being filtered out).
Change-Id: I5855d4d2bd9eb70bf5f77fb2dc8c712f74304a07
Closes-bug: #1536828