[UPDATE] textproc/elasticsearch sysutils/logstash www/kibana

Dear all,

Please find the updates for ELK stack 7.2.0 attached.
There are many breaking changes since 6.6.1,
please read the release notes carefully:

https://www.elastic.co/guide/en/elasticsearch/reference/6.8/breaking-changes-6.7.html
https://www.elastic.co/guide/en/elasticsearch/reference/7.2/breaking-changes-7.0.html
https://www.elastic.co/guide/en/elasticsearch/reference/7.1/breaking-changes-7.1.html

Looking for testers and OK's to commit.

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With best regards,
Pavel Korovin