Flaky test: should enable pods to ping each other via hostname

[tenzen-y]

JobSet when dns hostnames is enabled [It] should enable pods to ping each other via hostname
/home/prow/go/src/sigs.k8s.io/jobset/test/e2e/e2e_test.go:63
  [FAILED] Timed out after 120.001s.
  Expected
      <bool>: false
  to equal
      <bool>: true
  In [It] at: /home/prow/go/src/sigs.k8s.io/jobset/test/util/util.go:61 @ 05/10/23 16:26:41.124

https://prow.k8s.io/view/gs/kubernetes-jenkins/pr-logs/pull/kubernetes-sigs_jobset/123/pull-jobset-test-e2e-main-1-24/1656333510748672000

[tenzen-y]

ref: #123

[danielvegamyhre]

We should consider increasing the timeout from 2min to 5min perhaps, and/or adding a longer sleep at the end the end of the bash script here so the final pod to become ready has time to ping the other pods successfully before they complete.

[tenzen-y]

We should consider increasing the timeout from 2min to 5min perhaps, and/or adding a longer sleep at the end the end of the bash script here so the final pod to become ready has time to ping the other pods successfully before they complete.

Agree. I think this flaky test isn't caused by JobSet. Maybe, there are root causes in Headress Service (k/k).

cc: @ahg-g