Fix printMuzzleReferences gradle task

[mateuszrzeszutek]

Currently when you try to run the printMuzzleReferences task it fails with the following exception:

* What went wrong:
Execution failed for task ':printMuzzleReferences'.
> io.opentelemetry.javaagent.extension.instrumentation.InstrumentationModule: com.example.javaagent.instrumentation.DemoServlet3InstrumentationModule not a subtype

* Try:
Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':printMuzzleReferences'.
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.lambda$executeIfValid$1(ExecuteActionsTaskExecuter.java:188)
// ...
Caused by: java.util.ServiceConfigurationError: io.opentelemetry.javaagent.extension.instrumentation.InstrumentationModule: com.example.javaagent.instrumentation.DemoServlet3InstrumentationModule not a subtype
        at io.opentelemetry.javaagent.muzzle.matcher.MuzzleGradlePluginUtil.printMuzzleReferences(MuzzleGradlePluginUtil.java:113)

I suppose that's because we're trying to load InstrumentationModule with the gradle classloader, not the instrumentation classloader.

[mateuszrzeszutek]

@iNikem how to make that fix available? Should I bump the plugins' version by hand?

[iNikem]

@iNikem how to make that fix available? Should I bump the plugins' version by hand?

Yes, for now this is the way

[trask]

Yes, for now this is the way

yes? 😁