schema: allow for the setting of default time to live
schema: allow for the setting of default time to live

We have been leaving all the setter functions in the schema_builder, which is
usually fine.

The system tables, however, are not built this way, which means we need set
properties needed by them in some other way.

Signed-off-by: Glauber Costa <f8b79557d19b40666ebe336545a0b6178af65685@cloudius-systems.com>

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