Set wsgi logger to use __name__

Although underneath this is the eventlet.wsgi.server server, Other
OpenStack projects, don't use that logger instead they use there own.

This will also mean the wsgi server will stop logging on just the
warning level.  We want wsgi server to at least log on info level
so it will log when a request is processed and what the return code is.

Change-Id: I96fd73b84b4550f85ad96030fea815376901813a
(cherry picked from commit 83ce89f471d887ec9e3aa48c26ffe0d88a1957b1)
Merge "Set wsgi logger to use __name__" into stable/havana