Send results of acceptance tests to graphana

[eikek]

Is your feature request related to a problem? Please describe.
The acceptance tests are difficult to make reliable and deterministic and so the idea came up to collect their results so we can maybe have a better "feel" of an outcome. We could compare the current run against previous ones. Maybe it helps identifying real problems and distinguishing between more serious ones and just flaky tests.

Describe the solution you'd like
I think it would be great to see the previous results on Graphana somehow. Depending on how things are setup, maybe we can send some simple statsd lines from the test runner to whatever collects the data. I would send the outcome of each test (failed, succeeded) as well as their running time.

Describe alternatives you've considered
n.a.