Support BE plugin framework, include:
* update Plugin Manager, support Plugin find method
* support Builtin-Plugin register method
* plugin install/uninstall process
* PluginLoader:
* dynamic install and check Plugin .so file
* dynamic uninstall and check Plugin status
* PluginZip:
* support plugin remote/local .zip file download and extract
TODO:
* We should support a PluginContext to transmit necessary system variable when the plugin's init/close method invoke
* Add the entry which is BE dynamic Plugin install/uninstall process, include:
* The FE send install/uninstall Plugin statement (RPC way)
* The FE meta update request with Plugin list information
* The FE operation request(update/query) with Plugin (maybe don't need)
* Add the plugin status upload way
* Load already install Plugin when BE start
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