Staticweb shortcut object 404s

Right now static web checks to see if it should handle a
request and if it decides that it shouldn't, in all cases,
it lets the request pass through the pipeline normally.
After this change on "x-web-mode: t" obj requests where
staticweb is not setup and an object 404s it will just
return the 404 instead of letting the app send a duplicate
request to the object servers.

Change-Id: I824f4b03f7546d26084fd51b97ea6e290169d22a
Merge "Staticweb shortcut object 404s"