exo: failed async job should fail (#325)
exo: failed async job should fail (#325)

Signed-off-by: Yoan Blanc <7e8c88beed64bd6a341c3085bc82ac100e832f6e@exoscale.ch>
Reviewed-by: mcorbin <d95f8d4054014800f6291e99f5212e126fc68f81@gmail.com>
Reviewed-by: Pierre-Yves Ritschard <0598d79bb5ccdf1d6af292528bff6ce568f0d1a4@spootnik.org>
pyr/egoscale