[SPARK-35268][BUILD] Upgrade GenJavadoc to 0.17

[sarutak]

What changes were proposed in this pull request?

This PR upgrades GenJavadoc to 0.17.

Why are the changes needed?

This version seems to include a fix for an issue which can happen with Scala 2.13.5.
https://github.com/lightbend/genjavadoc/releases/tag/v0.17

Does this PR introduce any user-facing change?

No.

How was this patch tested?

I confirmed build succeed with the following commands.

# For Scala 2.12
$ build/sbt -Phive -Phive-thriftserver -Pyarn -Pmesos -Pkubernetes -Phadoop-cloud -Pspark-ganglia-lgpl -Pkinesis-asl -Pdocker-integration-tests -Pkubernetes-integration-tests unidoc

# For Scala 2.13
build/sbt -Phive -Phive-thriftserver -Pyarn -Pmesos -Pkubernetes -Phadoop-cloud -Pspark-ganglia-lgpl -Pkinesis-asl -Pdocker-integration-tests -Pkubernetes-integration-tests -Pscala-2.13 unidoc

[SparkQA]

Kubernetes integration test starting
URL: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder-K8s/42590/

[SparkQA]

Kubernetes integration test status failure
URL: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder-K8s/42590/

[SparkQA]

Test build #138070 has finished for PR 32392 at commit 60b9a23.

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

[dongjoon-hyun]

+1, LGTM. Thank you, @sarutak and @srowen .
Merged to master.