[FLINK-11259] Bump Zookeeper to 3.4.13

[Fokko]

The patched version provides some hotfixes:
https://zookeeper.apache.org/doc/r3.4.13/releasenotes.html

What is the purpose of the change

(For example: This pull request makes task deployment go through the blob server, rather than through RPC. That way we avoid re-transferring them on each deployment (during recovery).)

Brief change log

Bump Zookeeper dependency

Verifying this change

This change is a trivial rework / code cleanup without any test coverage.

• Dependencies (does it add or upgrade a dependency): yes
• The public API, i.e., is any changed class annotated with @Public(Evolving): no
• The serializers: no
• The runtime per-record code paths (performance sensitive): no
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: yes
• The S3 file system connector: no

Documentation

• Does this pull request introduce a new feature? no
• If yes, how is the feature documented? not applicable

[Fokko]

The error looks related, let me dive into it.

[Fokko]

Kafka09SecuredRunITCase is failing. Let's see which minor patch of Zookeeper fails the build.

[zentol]

Please don't use the Apache Travis for debugging. I will close this PR; feel free to re-open once you got a working solution.

[thomaslee]

Late to the party, but pointing out the test failure in question appears to be a ZK auth issue:

https://travis-ci.org/apache/flink/jobs/480142816#L9784

Possible something subtle changed between .10 and .13 but I'm not sure what at this point.

[thomaslee]

Comments on https://issues.apache.org/jira/browse/HADOOP-15974 sound awfully similar to the issue we encountered here, but sounds more involved than a simple auth issue.