cql3: make modification_statement::get_mutations() public
cql3: make modification_statement::get_mutations() public

batch_statement wants it.

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