apache-http、caffeine-cache、eh-cache、guava-cache、okhttp plugins are submitted in one phase。

[lemon-simple]

The new features are as follows:
1、apache-httpclient plugin
2、caffeine-cache plugin
3、eh-cache plugin
4、guava-cache plugin
5、okhttp client plugin

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.

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[zhaoyb1990]

PR has been committed to the new branch