fix timeout of background read repair request
fix timeout of background read repair request

Do not set _cl_promise on timeout if timeout happens after cl is
achieved. It may happen for background read repair requests.

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