* Docker integration tests stability improvements
This commit contains numerous fixes to improve the stability of the docker integration tests
* Patch Excon::UnixSocket
Socket.new running on arm64 on Ubuntu 18.04, causes an immediate SIGSEGV error and crash on
that OS, and, as far as I can tell, only that OS. `TCPSocket.new`,`UDPSocket.new` and
`UNIXSocket.new` do not. This commit patches the UnixSocket of the Excon library to
do the absolute simplest thing possible to avoid this error.
* Ensure that container is deleted even if #kill fails
* Add extra waits to handle the incremental way the payload returned by the monitoring
API increases as logstash starts up and pipelines load.
* Use pyenv to ensure the same version of python is used across different jenkins workers
* Add container logs to help diagnose failed test.
* Update the pipeline definition on multi-pipeline integration test
This was causing a pipeline to halt after startup causing intermittent test failures.
* Remove `;` to ensure failures are propagated appropriately
Co-authored-by: João Duarte <jsvd@users.noreply.github.com>
