Merge pull request #2788 from ceph/wip-warn-max-pg

mon: warn when there are too many pgs per osd

Reviewed-by: Joao Eduardo Luis <joao@redhat.com>
Reviewed-by: Samuel Just <sjust@redhat.com>

diff --cc src/common/config_opts.h
Simple merge

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

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

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

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

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