transport/server: Catch all request processing errors
transport/server: Catch all request processing errors

We need to also catch exceptions in top-level connection::process() so
that they are converted to proper CQL protocol errors.

Signed-off-by: Pekka Enberg <add4fcd06328a394f0ad91feda7ee057316dc5ed@cloudius-systems.com>

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