Log Message:
Update sysutils/beats to 5.2.0.

==== Bugfixes

Affecting all Beats

- Fix overwriting explicit empty config sections.

Filebeat

- Fix alignment issue were Filebeat compiled with Go 1.7.4 was crashing
  on 32 bits system.

Metricbeat

- Fix service times-out at startup.
- Kafka module case sensitive host name matching.
- Fix interface conversion panic in couchbase module

Packetbeat

- Fix issue where some Cassandra visualizations were showing data from
  all protocols.

==== Added

Affecting all Beats

- Add support for passing list and dictionary settings via -E flag.
- Support for parsing list and dictionary setting from environment
  variables.
- Added new flags to import_dashboards (-cacert, -cert, -key,
  -insecure).
- The limit for the number of fields is increased via the mapping
  template.
- Updated to Go 1.7.4.
- Added a NOTICE file containing the notices and licenses of the
  dependencies.

Heartbeat

- First release, containing monitors for ICMP, TCP, and HTTP.

Filebeat

- Add enabled config option to prospectors.
- Add target option for decoded_json_field.

Metricbeat

- Kafka module broker matching enhancements.
- Add a couchbase module with metricsets for node, cluster and bucket.
- Export number of cores for CPU module.
- Experimental Prometheus module.
- Add system socket module that reports all TCP sockets.
- Kafka consumer groups metricset.

Winlogbeat

- Reduced amount of memory allocated while reading event log records.