This patch plumbs the object-reconstructor stats that are dropped
into recon cache out through the middleware and swift-recon tool.
This adds a '/recon/reconstruction/object' to the middleware. As such
the swift-recon tool has grown a '-R' or '--reconstruction' option
access this data from each node.
Plus some tests and documentation updates.
Change-Id: I98582732ca5ccb2e7d2369b53abf9aa8c0ede00c
7a105b5ef0