keys: allow incomplete keys in from_clustering_prefix()
keys: allow incomplete keys in from_clustering_prefix()

Signed-off-by: Paweł Dziepak <e29bb3265626c60caf76d587cabdfcd8b379ef80@cloudius-systems.com>

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