Fix multimodule checkstyle configuration

[mkienow-r7]

Description

Fixes the multimodule checkstyle configuration which currently relies on the private and undocumented ¹² property maven.multiModuleProjectDirectory. This follows the Apache Maven Checkstyle Plugin example for a Multimodule Configuration.

Motivation and Context

The solution using maven.multiModuleProjectDirectory is not stable given it relies on a private and undocumented property limited to Maven versions 3.3.1 and greater. In addition, the current configuration fails to build successfully on the build server.

How Has This Been Tested?

• mvn clean install
• Modified build-tools/src/main/resources/recog-java/google_checks.xml and java source to introduce a checkstyle error. Ran mvn clean install and confirmed checkstyle error.

Types of changes

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• I have updated the documentation accordingly (or changes are not required).
• I have added tests to cover my changes (or new tests are not required).
• All new and existing tests passed.

Footnotes

1. MNG-6589 - Document property maven.multiModuleProjectDirectory ↩

2. MNG-7038 - Introduce public property to point to a root directory of (multi-module) project ↩