Add new member into cache
Add new member into cache

Current node SDK will create a new member object if
it is not in cache and restore state from persistence,
but it does not add new member in cache.

Change-Id: Ifb7b17e8e40c1b4afe59acefa020eb3f0760ed59
Signed-off-by: grapebaba <6a4c27fb06dd303c7bc2a61502d3c672e8e8a029@qq.com>

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