tests/cql_test_env: Init system_keyspace's local_cache
tests/cql_test_env: Init system_keyspace's local_cache

Soon storage_service will access it, we need to init it.

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