增加模块加载的拦截点

[JoeKerouac]

增加模块加载的拦截点，方便后续扩展

[CLAassistant]

Thank you for your submission, we really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 2 committers have signed the CLA.

✅ JoeKerouac
❌ 清英

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[coveralls]

Pull Request Test Coverage Report for Build 85

• 48 of 80 (60.0%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-4.3%) to 84.342%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
jarslink-api/src/main/java/com/alipay/jarslink/api/impl/ModuleLoaderImpl.java	20	52	38.46%

Totals
Change from base Build 80:	-4.3%
Covered Lines:	474
Relevant Lines:	562

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💛 - Coveralls