sysutils/beats: Update to 6.2.0.

==== Breaking changes

Affecting all Beats

- The log format may differ due to logging library changes.
- The default value for pipelining is reduced to 2 to avoid high
  memory in the Logstash beats input.

Auditbeat

- Split the audit.kernel and audit.file metricsets into their own
  modules
  named auditd and file_integrity, respectively. This change requires
  existing users to update their config.
- Renamed file_integrity module fields.
- Renamed auditd module fields.

Metricbeat

- Rename `golang.heap.system.optained` field to
  `golang.heap.system.obtained`.
- De dot keys in jolokia/jmx metricset to prevent collisions.

==== Bugfixes

Auditbeat

- Fixed an issue where the proctitle value was being truncated.
- Fixed an issue where values were incorrectly interpretted as hex
  data.
- Fixed parsing of the `key` value when multiple keys are present.
- Fix possible resource leak if file_integrity module is used with
  config
  reloading on Windows or Linux.

Filebeat

- Fix variable name for `convert_timezone` in the system module.

Metricbeat

- Fix error `datastore '*' not found` in Vsphere module.
- Fix error `NotAuthenticated` in Vsphere module.
- Fix mongodb session consistency mode to allow command execution on
  secondary nodes.
- Fix kubernetes `state_pod` `status.phase` so that the active phase
  is returned instead of `unknown`.
- Fix error collecting network_names in Vsphere module.
- Fix process cgroup memory metrics for memsw, kmem, and kmem_tcp.
- Fix kafka OffsetFetch request missing topic and partition
  parameters.

Packetbeat

- Fix mysql SQL parser to trim `\r` from Windows Server
  `SELECT\r\n\t1`.

==== Added

Affecting all Beats

- Adding a local keystore to allow user to obfuscate password
- Add autodiscover for kubernetes.
- Add Beats metrics reporting to Xpack.
- Update the command line library cobra and add support for zsh
  completion
- Update to Golang 1.9.2
- Moved `ip_port` indexer for `add_kubernetes_metadata` to all beats.
- `ip_port` indexer now index both IP and IP:port pairs.
- Add the ability to write structured logs.
- Use structured logging for the metrics that are periodically logged
  via the
  `logging.metrics` feature.
- Improve Elasticsearch output metrics to count number of dropped and
  duplicate (if event ID is given) events.
- Add the abilility for the add_docker_metadata process to enrich
  based on process ID.
- The `add_docker_metadata` and `add_kubernetes_metadata` processors
  are now GA, instead of Beta.
- Update go-ucfg library to support top level key reference and cyclic
  key reference for the
  keystore

Auditbeat

- Auditbeat is marked as GA, no longer Beta.
- Add support for BLAKE2b hash algorithms to the file integrity
  module.
- Add support for recursive file watches.

Filebeat

- Add Osquery module.
- Add stream filtering when using `docker` prospector.

Metricbeat

- Add ceph osd_df to metricbeat
- Add field network_names of hosts and virtual machines.
- Add experimental system/raid metricset.
- Add a dashboard for the Nginx module.
- Add experimental mongodb/collstats metricset.
- Update the MySQL dashboard to use the Time Series Visual Builder.
- Add experimental uwsgi module.
- Docker and Kubernetes modules are now GA, instead of Beta.
- Support haproxy stats gathering using http (additionaly to tcp
  socket).
- Support to optionally 'de dot' keys in http/json metricset to
  prevent collisions.

Packetbeat

- Configure good defaults for `add_kubernetes_metadata`.


(fhajny)