[SUREFIRE-2078] systemPropertyVariables not working

**[Delany](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=delany)** opened **[SUREFIRE-2078](https://issues.apache.org/jira/browse/SUREFIRE-2078?redirect=false)** and commented

Hi. Im trying to use the opentelemetry java agent, but either surefire is not passing through the parameters, or the agent is not picking them up.

It works if I pass via the {**}argLine{**}, but not via **systemPropertyVariables** or {**}systemProperties{**}.

https://maven.apache.org/surefire/maven-surefire-plugin/examples/system-properties.html

https://opentelemetry.io/docs/instrumentation/java/automatic/agent-config/

Here is my up-to-date reproducer

https://github.com/delanym/java-maven-junit-helloworld/tree/opentelemetry

Run `mvn test` and you should get a line on the console like

```
[otel.javaagent 2022-04-26 10:33:44:015 +0200] [main] INFO io.opentelemetry.exporter.logging.LoggingSpanExporter - 'HelloTest.testSayHelloAFewTimes' : be46c05e6d80182590d5289426358fb7 e4c666619bfc7c2d INTERNAL [tracer: io.opentelemetry.opentelemetry-anno
tations-1.0:1.13.0-alpha] AttributesMap{data={thread.id=1, thread.name=main}, capacity=128, totalAddedValues=2}
```

Try to use the systemPropertyVariables instead and it will not show.

---

**Affects:** 3.0.0-M6

Start with the linked java-maven-junit-helloworld reproducer and run `mvn test` using `argLine`, then repeat with `systemPropertyVariables` or `systemProperties`. Compare the agent output in each case and trace how Surefire passes these settings; done means the system-property configuration produces the same expected OpenTelemetry output.

Written by the indexing model from the issue text.