Refactoring test to use isolated test-only plugin to avoid weirdness on windows when dependency artifact is present but isn't a valid jar.
maven/core-integration-testing/trunk/core-integration-tests/src/test/java/org/apache/maven/integrationtests/MavenITmng3680InvalidDependencyPOMTest.java
maven/core-integration-testing/trunk/core-integration-tests/src/test/resources/mng-3680-invalidDependencyPOM/maven-mng3680-plugin/