Update kafka support

[urso]

• Update kafka client library (sarama) Update sarama to release v1.16.0 #7025
• Test lz4 compression (kafka 0.11, 1.0) Kafka output LZ4 compression support #4647, Issue with filebeat kafka output with lz4 compression #6414, filebeat fails to use lz4 with kafka 1.0 #6540
• Test with different kafka versions (set kafka version setting)
  • 0.9
  • 0.10
  • 0.11
  • 1.0
  • 1.1 Increase kafka version in tests to 1.1.1 #7655
  • 2.0
• Metricbeat module enhancements Metricbeat Kafka Module Enhancements #3005
• Update Documentation to include new versions Update sarama (kafka client) to 1.17 #7665

[ppf2]

Added 2.0 to the list with Kafka 2.0 release from 1.5 weeks ago. If we prefer to track 2.0 separately, let me know and I can spin off another ticket :)