impossible to catch 'all job servers fail' error

[dcolens]

The error 'all job servers fail' is thrown before the job is returned making it impossible for a client app to catch it.
in the scenario where all servers are temporarily invalid, line

GearmaNode/lib/gearmanode/client.js

Line 165 in 8ad6e48

return job.emit('error', new Error('all job servers fail'));

triggers before line

GearmaNode/lib/gearmanode/client.js

Line 172 in 8ad6e48

return job;

.