Align timeout to OAR's API with api-proxy's timeout (180)

OAR can take time to schedule jobs, raising the timeout is necessary to
avoid errors.
5 jobs for master in 26 minutes and 59 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Lint
passed #1308660
grid5000-docker
rubocop

00:01:39

 
  Test
passed #1308661
grid5000-docker
test-for-buster

00:15:52

80.46%
 
  Deb
passed #1308662
grid5000-docker
deb-for-buster

00:09:27

 
  Deploy
manual #1308663
grid5000-packages manual
push-buster-package
 
  .Post
created #1308664
grid5000-docker allowed to fail
sonarqube