Flaky test: DockerSwarmSuite.TestSwarmNodeTaskListFilter

[dnephin]

https://jenkins.dockerproject.org/job/Docker-PRs-experimental/21601/console

10:27:45 FAIL: docker_cli_swarm_test.go:181: DockerSwarmSuite.TestSwarmNodeTaskListFilter
10:27:45 
10:27:45 [d23266881] waiting for daemon to start
10:27:45 [d23266881] daemon started
10:27:45 docker_cli_swarm_test.go:193:
10:27:45     c.Assert(out, checker.Contains, name+".1")
10:27:45 ... obtained string = "ID  NAME  SERVICE  IMAGE  LAST STATE  DESIRED STATE  NODE\n"
10:27:45 ... substring string = "redis-cluster-md5.1"
10:27:45 
10:27:45 [d23266881] exiting daemon

3 failures on master in the last 24h, and a few on PRs as well

[dnephin]

Looking into this.

[yongtang]

@dnephin I created a PR #25084 to make sure task has been fully up. Hopefully it fixes the issue.

[dnephin]

Thanks! That fix looks correct to me.