[hotfix][e2e] Disable Streaming File Sink s3 e2e test until FLINK-15355 has been fixed

[carp84]

What is the purpose of the change

Disable Streaming File Sink s3 e2e test temporarily until FLINK-15355 has been fixed, since it's blocking the nightly build and may undercover some other problems.

Brief change log

Disable Streaming File Sink s3 e2e test temporarily in relative travis scripts.

Verifying this change

This change is a trivial work as described.

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): (no)
• The public API, i.e., is any changed class annotated with @Public(Evolving): (no)
• The serializers: (no)
• The runtime per-record code paths (performance sensitive): (no)
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (no)
• The S3 file system connector: (no)

Documentation

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

[carp84]

Supplement: the proposed change is similar to what was done through 2c2095b

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Automated Checks

Last check on commit f9989af (Thu Dec 26 09:48:42 UTC 2019)

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CI report:

• f9989af Travis: SUCCESS Azure: SUCCESS

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[carp84]

Only need to apply to release-1.10, opened #10699 instead.