db: add getter for database::_keyspaces
db: add getter for database::_keyspaces

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

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