[SPARK-24963][K8S][TESTS] Don't set service account name for client mode test

[mccheah]

What changes were proposed in this pull request?

Don't set service account name for the pod created in client mode

How was this patch tested?

Test should continue running smoothly in Jenkins.

[mccheah]

@skonto can you try this with spark-rbac.yaml?

[mccheah]

ok to test

[SparkQA]

Kubernetes integration test starting
URL: https://amplab.cs.berkeley.edu/jenkins/job/testing-k8s-prb-make-spark-distribution-unified/1425/

[SparkQA]

Test build #93694 has finished for PR 21900 at commit c22397c.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Kubernetes integration test status success
URL: https://amplab.cs.berkeley.edu/jenkins/job/testing-k8s-prb-make-spark-distribution-unified/1425/

[skonto]

@mccheah Thanks I will give it a shot. Sorry missed it. Will try with the internal ci job, should be ok.

[skonto]

@felixcheung @mccheah this was not fixed.
You need to add this line: withServiceAccount(kubernetesTestComponents.serviceAccountName)
in the driver's pod spec.
It still fails with:

User "system:serviceaccount:spark:default" cannot get pods in the namespace "spark".

With the above addition it runs fine.