Remove a stat warning log

If using load balancer before keystone and the port numbers was
different between load balancer and keystone, too many stat warning logs
could be found in logs. The root cause is the keystone servers' stat
logic getting the request host information which point to load balancer
ip address and port rather than the ips and ports of themselves.

Fixes bug #1189118
Change-Id: Ic837af77bc2509086c0e37194ba70b683f693ae5
Merge "Remove a stat warning log"