core: Use futurize<> to unify then_wrapped() specializations
core: Use futurize<> to unify then_wrapped() specializations

rluta/scylla,eklitzke/scylla,dreamsxin/seastar,anzihenry/seastar,acbellini/seastar,aruanruan/scylla,avikivity/seastar,asias/scylla,linearregression/seastar,shaunstanislaus/scylla,flashbuckets/seastar,wildinto/seastar,avikivity/seastar,sjperkins/seastar,flashbuckets/seastar,raphaelsc/seastar,chunshengster/seastar,dwdm/seastar,raphaelsc/seastar,hongliangzhao/seastar,kjniemi/scylla,raphaelsc/scylla,scylladb/scylla,bowlofstew/scylla,mixja/seastar,wildinto/scylla,linearregression/scylla,aruanruan/scylla,eklitzke/scylla,dreamsxin/seastar,stamhe/seastar,avikivity/scylla,shaunstanislaus/scylla,jonathanleang/seastar,scylladb/scylla-seastar,joerg84/seastar,gwicke/scylla,kangkot/scylla,duarten/scylla,avikivity/seastar,capturePointer/scylla,linearregression/scylla,mixja/seastar,chunshengster/seastar,glommer/scylla,leejir/seastar,eklitzke/scylla,norcimo5/seastar,linearregression/seastar,justintung/scylla,victorbriz/scylla,stamhe/scylla,scylladb/seastar,kjniemi/seastar,dwdm/scylla,shyamalschandra/seastar,raphaelsc/scylla,avikivity/scylla,leejir/seastar,glommer/scylla,justintung/scylla,scylladb/scylla,kjniemi/scylla,stamhe/seastar,victorbriz/scylla,bowlofstew/seastar,asias/scylla,bowlofstew/seastar,ducthangho/imdb,shyamalschandra/seastar,justintung/scylla,stamhe/scylla,duarten/scylla,guiquanz/scylla,cloudius-systems/seastar,acbellini/seastar,bzero/seastar,scylladb/scylla,gwicke/scylla,xtao/seastar,gwicke/scylla,koolhazz/seastar,printedheart/seastar,kjniemi/seastar,scylladb/scylla-seastar,anzihenry/seastar,rluta/scylla,senseb/scylla,acbellini/scylla,kjniemi/seastar,tempbottle/scylla,raphaelsc/scylla,mixja/seastar,victorbriz/scylla,jonathanleang/seastar,aruanruan/scylla,ducthangho/imdb,dwdm/scylla,hongliangzhao/seastar,anzihenry/seastar,tempbottle/seastar,koolhazz/seastar,capturePointer/scylla,duarten/scylla,xtao/seastar,guiquanz/scylla,stamhe/seastar,bzero/seastar,asias/scylla,sjperkins/seastar,syuu1228/seastar,scylladb/scylla,phonkee/scylla,dwdm/scylla,xtao/seastar,linearregression/seastar,scylladb/scylla-seastar,stamhe/scylla,chunshengster/seastar,leejir/seastar,linearregression/scylla,hongliangzhao/seastar,wildinto/seastar,kangkot/scylla,senseb/scylla,raphaelsc/seastar,wildinto/scylla,shyamalschandra/seastar,bowlofstew/scylla,senseb/scylla,printedheart/seastar,avikivity/scylla,syuu1228/seastar,printedheart/seastar,bowlofstew/seastar,cloudius-systems/seastar,respu/scylla,tempbottle/scylla,sjperkins/seastar,norcimo5/seastar,phonkee/scylla,jonathanleang/seastar,scylladb/seastar,wildinto/scylla,koolhazz/seastar,phonkee/scylla,rluta/scylla,dwdm/seastar,ducthangho/imdb,shaunstanislaus/scylla,acbellini/scylla,dreamsxin/seastar,norcimo5/seastar,flashbuckets/seastar,syuu1228/seastar,bzero/seastar,tempbottle/seastar,capturePointer/scylla,wildinto/seastar,kangkot/scylla,glommer/scylla,respu/scylla,dwdm/seastar,rentongzhang/scylla,rentongzhang/scylla,bowlofstew/scylla,guiquanz/scylla,cloudius-systems/seastar,acbellini/scylla,rentongzhang/scylla,tempbottle/seastar,acbellini/seastar,joerg84/seastar,kjniemi/scylla,scylladb/seastar,joerg84/seastar,respu/scylla,tempbottle/scylla