tests: Bring back tests/urchin/message.cc
tests: Bring back tests/urchin/message.cc

Change to use the new messaging_service API.

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