'src/test/resources' fails in Gradle Multi-module project

I have a Gradle multi-project configuration where my sub-project tests are not able to access `src/test/resources` for their individual projects.

This has been working in the past and I do have it working for some of my older projects that I imported but I can't determine what the difference is between the projects since they were copied from one another.

Steps to reproduce:

1. Create a Gradle mulit-project project using Groovy
2. Create test files in one of the sub-project's src/test/resources directory.
3. Attempt to access the file in a Spock Unit Test (probably any Unit Test).
4. Observe: java.io.FileNotFoundException: src/test/resources/test-file.json (No such file or directory)

The same tests work when run using Gradle from the command line.  If I have IDEA delegate to the Gradle test runner it still fails.  I prefer to use the Platform Test Runner as it is significantly quicker but neither works from inside the IDE.

The root of the problem seems to be the base path used when the tests are run.  For a test, I created a project called "idea-resources-issue" with a sub-project called "core".  When I inspect where the test runner is looking for the `src/test/resources` files it is looking in: /home/mike/git/idea-resources-issue/.idea/modules/core/.   It should be /home/mike/git/idea-resources/core/.

If it helps to pass along the project, I can spend some time to get rid of my proprietary code so I can share.