[MCHECKSTYLE-185] Empty checkstyle-results.xml in a tests-only project
Submitted by: Peter Janes
Reviewed by: Dennis Lundberg

[MCHECKSTYLE-144] If 'src/main/java' does not exist in a project then checkstyle skips the other source folders of the project

The IT that was supposed to catch this multi-modules-aggregate/child-b was incorrectly set up. It had the test class in src/main/java which made the IT pass even though it should have failed.

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1438948 13f79535-47bb-0310-9956-ffa450edef68