maven-plugin: Does not handle multi-module projects where the top-level project is just a reactor

[bjhargrave]

This code in the mojo:

dash-licenses/maven-plugin/src/main/java/org/eclipse/dash/licenses/maven/LicenseCheckMojo.java

Lines 177 to 182 in 36a6914

	// We are aggregating the deps for all projects in the reactor, so we only need
	// to execute once. This check ensures we run only during the build of the
	// top-level reactor project and avoids duplicate invocations
	if (!mavenSession.getCurrentProject().equals(mavenSession.getTopLevelProject())) {
	return;
	}

just returns without doing anything when the project is not the top-level project. But if the top-level project is just a reactor and not a parent to the other modules in the build, then there is no output from the license-tool.

See the Eclipse Transformer project for an example. After adding the license-tool to the build (bjhargrave/transformer@c3e061b), the build shows no results for the license-check goal.

https://github.com/bjhargrave/transformer/actions/runs/10727766241/job/29750817183#step:6:1584

[INFO] --- license-tool:1.1.0:license-check (license-check) @ org.eclipse.transformer ---
[INFO] 
[INFO] --- install:3.1.3:install (default-install) @ org.eclipse.transformer ---