watcher should checks quotas

[Olivier Sallou]

for a running job, quotas should be checked. If quota is reached, kill or reschedule the job (according to config)

[Olivier Sallou]

at gpu quotas and watch quotas in watcher, set quotas at time based eg cpu/s, Closes #62 Closes #61

→ <<cset 894cc1de7bc3>>