Merge pull request #843 from ceph/wip-osd-metadata

feed osd info about os, kernel, memory, arch to the mons

Reviewed-by: Joao Eduardo Luis <joao.luis@inktank.com>
Reviewed-by: Loic Dachary <loic@dachary.org>

diff --cc src/mon/MonCommands.h
Simple merge

diff --cc src/mon/OSDMonitor.cc
Simple merge

diff --cc src/osd/OSD.cc
Simple merge

diff --cc src/osd/OSD.h
Simple merge

diff --cc src/test/pybind/test_ceph_argparse.py
Simple merge