[dev] force creation of disk and diskpath properties on all sites (bug 9357)

... and update tests output accordingly
there's no need to force the creation of gpu_model here since it part
of the generated properties now.
5 jobs for bug9357 in 6 minutes and 11 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Validate
passed rubocop #1138408
grid5000-docker

00:00:24

passed validate-data #1138409
grid5000-docker

00:01:32

 
  Generate
passed generate-reference-api #1138410
grid5000-docker

00:01:27

 
  Deploy
passed deploy #1138411
grid5000-shell

00:00:04

passed rspec #1138412
grid5000-docker

00:03:10