The deprecated `has_key` method has been removed from upstream
stdlib.

puppetlabs/puppetlabs-stdlib#1319

Co-authored-by: Phil Fenstermacher <pcfens@wm.edu>

* add publisher_pipeline.disable_host flag to input template

* added parameter description to README

* Update README.md

* add support for features config section

* add support for features config section

---------

Co-authored-by: Guillaume Nobiron <gnobiron@talentsoft.com>

Co-authored-by: Mark Lamers <m.r.lamers@umcutrecht.nl>

The new optional Boolean parameter `take_over` for `filebeat::input`
defaults to `undef` but can be set to `true` to enable the "take over"
functionality when switching from the deprecated `log` input type to the
new `filestream` type. This allows Filebeat to take over files from the
`log` input without completely re-ingesting the files, which leads to
duplicated log entries. This feature is available in Filebeat 8.x.

This change adds very basic spec tests for the `filestream` input type
and the `take_over` logic, and updates the docs where appropriate.

Check if result of exec contains "error". This covers cases when filebeat config is not in the same directory