each oob test runs at least 2s (2 verifications with each server sending
report each 1s), current configuration allows at most 3 clients run in
parallel. In reality, probably only the two clients against one server.
Currently 8 jobs are running each batch, and it happens that each batch
has at most 2 oob clients against one server.
Since 3 languages support orca, so we should allow 3 clients running
against one server so the timeout is at least 4s. We give some buffers
to allow tests running more reliably.
10s in theory support 5-6 clients running against one server.