Implement queue locking in node daemon
Implement queue locking in node daemon

Reviewed-by: iustinp


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