Return XML message with objectserver 404.

Resolves bug 1076534 by adding a XML formatted message to HTTP
requests which result in a status of 404.

Change-Id: I4afbdc0f6bd5f3a78729351cee570c50952a6843
Merge "Return XML message with objectserver 404."
Merge remote-tracking branch 'm_src_repo/master' into build-temp