GH-430 - Avoid duplicate inclusions of modules in test executions.

Author: odrotbohm

spring-modulith-test/src/main/java/org/springframework/modulith/test/ModuleTestExecution.java

@@ -79,7 +79,7 @@ private ModuleTestExecution(ApplicationModuleTest annotation, ApplicationModules
 
 			var bootstrapDependencies = module.getBootstrapDependencies(modules,
 					bootstrapMode.getDepth());
-			return Stream.concat(bootstrapDependencies, extraIncludes.stream()).toList();
+			return Stream.concat(bootstrapDependencies, extraIncludes.stream()).distinct().toList();
 		});
 
 		if (annotation.verifyAutomatically()) {