[FLINK-14556][python] Correct the package of cloudpickle

[dianfu]

What is the purpose of the change

This pull request corrects the cloudpickle package.

Brief change log

• Corrects the cloudpickle package

Verifying this change

Test manually in a standalone cluster.

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)

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Automated Checks

Last check on commit 97ce3c4 (Wed Dec 04 14:53:40 UTC 2019)

Warnings:

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CI report:

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[hequn8128]

@dianfu Thanks a lot for the fix. LGTM.
Merging...