This introduces the configuration for metrics in the peer, initializes
the metrics provider, wires grpc interceptors for metrics and logging,
and establishes basic integration tests to ensure some metrics are
exported by the peer.

FAB-12713 #done
FAB-12711 #done

Change-Id: I47f44df4e11e3aeaaf401cb6a200bd4161a6e4db
Signed-off-by: Matthew Sykes <sykesmat@us.ibm.com>