ubuntu-1604 issues in acceptance testing with installation and update

seen at https://logstash-ci.elastic.co/job/elastic+logstash+master+multijob-acceptance/label=metal,suite=debian/22/console

```
Failures:

1) artifacts operation behaves like installable is running on ubuntu-1604
Failure/Error: expect(logstash).to be_running
expected #, @options={"host"=>"ubuntu-1604", "type"=>"debian"}> to be running
Shared Example Group: "installable" called from /var/lib/jenkins/workspace/elastic+logstash+master+multijob-acceptance/label/metal/suite/debian/qa/acceptance/spec/lib/artifact_operation_spec.rb:12
# /var/lib/jenkins/workspace/elastic+logstash+master+multijob-acceptance/label/metal/suite/debian/qa/acceptance/spec/shared_examples/installed.rb:17:in `(root)'
# /var/lib/jenkins/workspace/elastic+logstash+master+multijob-acceptance/label/metal/suite/debian/qa/Rakefile:58:in `(root)'

2) artifacts operation behaves like updated can be updated an run on ubuntu-1604
Failure/Error: expect(logstash).to be_running
expected #, @options={"host"=>"ubuntu-1604", "type"=>"debian"}> to be running
Shared Example Group: "updated" called from /var/lib/jenkins/workspace/elastic+logstash+master+multijob-acceptance/label/metal/suite/debian/qa/acceptance/spec/lib/artifact_operation_spec.rb:13
# /var/lib/jenkins/workspace/elastic+logstash+master+multijob-acceptance/label/metal/suite/debian/qa/acceptance/spec/shared_examples/updated.rb:23:in `(root)'
# /var/lib/jenkins/workspace/elastic+logstash+master+multijob-acceptance/label/metal/suite/debian/qa/Rakefile:58:in `(root)'

Finished in 52 minutes 21 seconds (files took 1.04 seconds to load)
72 examples, 2 failures, 4 pending
```