Resolve "Add global cache for jihu members' info."

What does this MR do and why?

Some processors need to get info of jihu members, so every time they use some api to get the info from .yml file, which requires massive IO cost. So that caching the member info is very important and that's what this MR wants to do.

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How to set up and validate locally

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MR acceptance checklist

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• Modify related code to add cache for jihu members'info.
• Add test case for new caching mechanism.
• Test it on GDK.
• Test it on Staging env.
• Merge into master.

Closes #30 (closed)