title: Spring cloud gateway redis rate limiter don't work
body: <p>I cannot play with ratelimiter of spring cloud gateway.
  Here I config gateway:</p>
  
  <pre><code>spring:
    cloud:
      gateway:
        discovery:
          locator:
            enabled: true
        routes:
        #Admin
        - id: haft-upms-admin
          uri: lb://haft-upms-admin
          predicates:
          - Path=/admin/**
          filters:
          - name: RequestRateLimiter
            args:
              key-resolver: '#{@remoteAddrKeyResolver}'
              redis-rate-limiter.replenishRate: 1
              redis-rate-limiter.burstCapacity: 1
          - name: Hystrix
            args:
              name: default
              fallbackUri: 'forward:/fallback'
  </code></pre>
  
  <p>I use JMeter to call API loop 1000 times but gateway not response 429 too many request in response.
  Where I wrong?</p>