Commented Issue: Modify HttpControllerHandler.ConvertRequest to not throw if request can be read [1696]

If the user opted to use a Buffered policy and ended up reading the stream in entirety, we can continue accessing the stream via Request.InputStream. Today we opt to throw instead in this case.
Comments: Fixed in changeset e0a53c23c693c904dcb59da5d5e487db806568ec