[FLINK-14419][table] Add ModuleFactory, ModuleDescriptor, ModuleDescriptorValidator for factory discovery service, and add implementations for CoreModule

[bowenli86]

What is the purpose of the change

Add ModuleFactory, ModuleDescriptor, ModuleValidator for factory discovery service, and add implementations for CoreModule.

Brief change log

• added ModuleFactory, ModuleDescriptor, ModuleDescriptorValidator interfaces for factory discovery service
• added CoreModuleFactory, CoreModuleDescriptor, CoreModuleDescriptorValidator
• added UT

Verifying this change

This change added tests and can be verified as CoreModuleFactoryTest and CoreModuleDescriptorTest

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): (yes)
• 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? (yes)
• If yes, how is the feature documented? (docs / JavaDocs)

docs will be added later

[bowenli86]

@xuefuz @lirui-apache @zjuwangg

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Automated Checks

Last check on commit 627cd21 (Wed Dec 04 14:58:42 UTC 2019)

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• ❓ 1. The [description] looks good.
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• ❓ 5. Overall code [quality] is good.

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[xuefuz]

+1

[lirui-apache]

Why we have two ModuleDescriptor classes?

[bowenli86]

@lirui-apache I removed the dup one. Pls take another look

[lirui-apache]

LGTM now. Thanks.