lib: raft: rearm heartbeat timer out of prepare_append_entries
lib: raft: rearm heartbeat timer out of prepare_append_entries

vmaffione/rlite,vmaffione/rlite,autrimpo/rlite,autrimpo/rlite,vmaffione/rlite,vmaffione/rlite,autrimpo/rlite,autrimpo/rlite