osd/ReplicatedPG: apply log to new HitSet to capture writes after peering

Signed-off-by: Sage Weil <sage@inktank.com>
osd/HitSet: make pg_pool_t and Params operator<< less parenthetical

pool 0 'data' rep size 2 min_size 1 crush_ruleset 0 object_hash rjenkins pg_num 8 pgp_num 8 last_change 8 owner 0 crash_replay_interval 45 hit_set bloom{false_positive_probability: 0, target size: 0, seed: 0} 10s x8

Signed-off-by: Sage Weil <sage@inktank.com>
mon/OSDMonitor: non-zero default bloom fpp

Signed-off-by: Sage Weil <sage@inktank.com>
osd/HitSet: take Params as const ref to avoid confusion about ownership

Signed-off-by: Sage Weil <sage@inktank.com>
osd: prevent zero BloomHitSet fpp

Signed-off-by: Sage Weil <sage@inktank.com>