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ead5096fa9
Currently auth tokens are generated in the replicated state machine layer randomly. It means one auth token generated in node A cannot be used for node B. It is problematic for load balancing and fail over. This commit moves the token generation logic from the state machine to API layer (before raft) and let all nodes share a single token. Log index of Raft is also added to a token for ensuring uniqueness of the token and detecting activation of the token in the cluster (some nodes can receive the token before generating and installing the token in its state machine). This commit also lets authStore have simple token related things. It is required because of unit test. The test requires cleaning of the state of the simple token things after one test (succeeding test can create duplicated token and it causes panic).