* Update logstash docker to use ubuntu 20.04 base image
* Correctly set locale for ubuntu docker image
* tiny typo fix: ubunto -> ubuntu
Co-authored-by: João Duarte <jsvd@users.noreply.github.com>
* Introduce integration tests for docker
This commit adds integration tests for the Logstash docker images. Previous
integration tests were removed in https://github.com/elastic/logstash/pull/10693,
due to the tests being non functional.
The commit adds image and container tests. The image tests check the contents and the
metadata of the image; the container tests check the logstash process, and includes tests
ensuring that logstash runs, and is configurable.
This test also adds a ci script to allow the tests to be run on jenkins, and to split the
running of these tests up based on the image type and includes updates to the rake tasks to
support this.
