raft: introduce/fix TestPreVoteWithCheckQuorum#8334

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xiang90 merged 1 commit intoetcd-io:masterfrom lishuai87:shawnsli/reset-leader-when-become-pre-candidate

Dec 28, 2018

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Commits on Dec 28, 2018

raft: set lead to none when becomePreCandidate
lishuai87
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