ceph: set pg_num_min on new rgw metadata pools
ceph: set pg_num_min on new rgw metadata pools

pg_num_min needs to be set on all new and existing rgw
metadata pools so the autoscaler won't immediately
increase the pg count. The pg_num_min was only being set
on existing pools and not on new pools.

Signed-off-by: Travis Nielsen <a8b474fdb3f77f44446f0ab9ddca8147b09b3a9e@redhat.com>

rook/nfs,rook/rook,rook/nfs,rook/rook,rook/rook,rook/rook,rook/nfs,rook/rook