This reverts commit e3679217d1.
This commit broke using the heat API when client requests were
behind a proxy (this sets the X-Forwarded-For header)
and effectively causes the heat-api to return the clients
IP address back in the request via the location header.
I believe the original (unapproved) heat blueprint for
this feature should have used X-Forwarded-Host instead.
Closes-bug: #1316754
Change-Id: I1b38ececf59545a3c13c7ebf2c33be97f4332ac0