tests: cql_test_env: Enable persistence in tests
tests: cql_test_env: Enable persistence in tests

Gives more coverage.

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