[FLINK-17616][tests] Temporarily increase akka.ask.timeout in TPC-DS e2e test

[GJL]

What is the purpose of the change

This increases the akka.ask.timeout in the TPC-DS e2e test until FLINK-17558 is fixed.

Brief change log

• See commit

Verifying this change

This change is a trivial rework / code cleanup without any test coverage.

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• Dependencies (does it add or upgrade a dependency): (yes / no)
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• The runtime per-record code paths (performance sensitive): (yes / no / don't know)
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: (yes / no / don't know)
• The S3 file system connector: (yes / no / don't know)

Documentation

• Does this pull request introduce a new feature? (yes / no)
• If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)

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Last check on commit 8aa7c03 (Mon May 11 11:50:10 UTC 2020)

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CI report:

• 8aa7c03 Azure: SUCCESS

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[tillrohrmann]

Thanks for creating this PR @GJL. LGTM. +1 for merging.

[GJL]

Merging. Ran the test 30 times on my private azure pipelines. It did not fail due to FLINK-17194.