Don't log SystemExit exception in ganeti-watcher
Don't log SystemExit exception in ganeti-watcher

Reviewed-by: iustinp


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