ceph.conf: set new pg max per osd limit
This is replacing the old one, but we need to keep the old one for
upgrades etc.
ms die on old message = true
mon pg warn min per osd = 1
- mon pg warn max per osd = 10000
+ mon pg warn max per osd = 10000 # <= luminous
+ mon max pg per osd = 10000 # >= luminous
mon pg warn max object skew = 0
osd pool default size = 2
