db: consistency_level.hh: added is_sufficient_live_nodes()
db: consistency_level.hh: added is_sufficient_live_nodes()

Signed-off-by: Vlad Zolotarov <976c0f8d0852ed6439ad273880b400a75a7c41d0@cloudius-systems.com>

aruanruan/scylla,kjniemi/scylla,avikivity/scylla,tempbottle/scylla,wildinto/scylla,gwicke/scylla,wildinto/scylla,capturePointer/scylla,eklitzke/scylla,justintung/scylla,scylladb/scylla,respu/scylla,bowlofstew/scylla,rentongzhang/scylla,justintung/scylla,eklitzke/scylla,raphaelsc/scylla,duarten/scylla,linearregression/scylla,rentongzhang/scylla,kangkot/scylla,rentongzhang/scylla,stamhe/scylla,rluta/scylla,victorbriz/scylla,glommer/scylla,linearregression/scylla,stamhe/scylla,senseb/scylla,phonkee/scylla,respu/scylla,rluta/scylla,justintung/scylla,scylladb/scylla,raphaelsc/scylla,capturePointer/scylla,gwicke/scylla,dwdm/scylla,guiquanz/scylla,scylladb/scylla,aruanruan/scylla,avikivity/scylla,kjniemi/scylla,eklitzke/scylla,victorbriz/scylla,aruanruan/scylla,stamhe/scylla,asias/scylla,dwdm/scylla,glommer/scylla,guiquanz/scylla,linearregression/scylla,asias/scylla,tempbottle/scylla,kangkot/scylla,asias/scylla,capturePointer/scylla,raphaelsc/scylla,acbellini/scylla,phonkee/scylla,victorbriz/scylla,wildinto/scylla,bowlofstew/scylla,senseb/scylla,bowlofstew/scylla,respu/scylla,kjniemi/scylla,senseb/scylla,shaunstanislaus/scylla,duarten/scylla,gwicke/scylla,dwdm/scylla,guiquanz/scylla,duarten/scylla,acbellini/scylla,shaunstanislaus/scylla,kangkot/scylla,acbellini/scylla,scylladb/scylla,shaunstanislaus/scylla,tempbottle/scylla,phonkee/scylla,rluta/scylla,avikivity/scylla,glommer/scylla