[FRS-34] Adapt to Flink 1.15

[wsry]

What is the purpose of the change

This solves #34 . Flink remote shuffle can work with Flink 1.15 now.

Brief change log

• Adapt to interface changes of Flink 1.15.
• Upgrade the curator version and hadoop version.

Verifying this change

This change is already covered by existing tests.

[wsry]

@TanYuxin-tyx Thanks for your review and feedback, I have updated the PR.