grpctestify 1.8.6

--- META ---
name: Benchmark smoke test
tags: [bench, smoke]

--- BENCH ---
assert_mode: sampled
concurrency: 4
duration: 30s
mode: fixed
profile: smoke
requests: 1000
sample_rate: 0.1
thresholds.error_rate_pct: <1.0
thresholds.latency_ms.p(95): <200
warmup: 3s

--- ENDPOINT ---
helloworld.Greeter/SayHello

--- REQUEST ---
{
  "name": "World"
}

--- RESPONSE ---
{
  "message": "Hello, World!"
}