cfgupgrade: Add logging module
cfgupgrade: Add logging module

Reviewed-by: iustinp


andir/ganeti,leshchevds/ganeti,grnet/snf-ganeti,grnet/snf-ganeti,apyrgio/ganeti,ganeti/ganeti,andir/ganeti,yiannist/ganeti,dimara/ganeti,yiannist/ganeti,bitemyapp/ganeti,ganeti-github-testing/ganeti-test-1,leshchevds/ganeti,andir/ganeti,yiannist/ganeti,onponomarev/ganeti,mbakke/ganeti,ganeti-github-testing/ganeti-test-1,dimara/ganeti,ganeti/ganeti,apyrgio/snf-ganeti,bitemyapp/ganeti,apyrgio/ganeti,mbakke/ganeti,mbakke/ganeti,leshchevds/ganeti,apyrgio/snf-ganeti,ganeti/ganeti,onponomarev/ganeti