add more fields to system schema
add more fields to system schema

double_type now exists.

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

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