Grails integration tests are failing to run in an "integration" context - fail immediatly

[https://intellij-support.jetbrains.com/hc/en-us/community/posts/115000474324-Grails-integration-tests-incorrectly-running-as-unit-tests-since-last-intellij-update-2017-2-1-causing-No-transactionManager-was-specified-errors?page=1#community_comment_115000402384](https://intellij-support.jetbrains.com/hc/en-us/community/posts/115000474324-Grails-integration-tests-incorrectly-running-as-unit-tests-since-last-intellij-update-2017-2-1-causing-No-transactionManager-was-specified-errors?page=1#community_comment_115000402384)

Some details from the forum above. Test case project attached. Steps:

1. Open project (grails 3.2.11) as gradle with auto import
2. Right click on src/integration-tests -> Run All Tests
Immediate failure:
```
java.lang.IllegalStateException: No transactionManager was specified. Using @Transactional or @Rollback requires a valid configured transaction manager. If you are running in a unit test ensure the test has been properly configured and that you run the test suite not an individual test method.

at grails.transaction.GrailsTransactionTemplate.(GrailsTransactionTemplate.groovy:60)
at PersonIntegrationSpec.Creating people should work(PersonIntegrationSpec.groovy)
```
- It appears that the grails integration environment isn't starting, and the test is running as though it were a unit test, which it is not.
- grails test-app works fine

Host System:
IntelliJ IDEA Ultimate 2017.2.1 Build #IU-172.3544.35 July 31 / JRE 1.8.0_152-release-915b6 x86_64
java 8u131-zulu
grails 3.2.11
macOS Sierra 10.12.6

---

*Imported from [IDEA-176984](https://youtrack.jetbrains.com/issue/IDEA-176984) · Type: Bug · Votes: 1*
*Comments, attachments, dates and reporter are not part of the export — follow the link above for the full history.*

Reproduce the failure by opening the Grails 3.2.11 project and running all tests from src/integration-tests, then compare it with the successful grails test-app run. Trace how the IntelliJ run action launches PersonIntegrationSpec.groovy and verify that it starts the integration environment rather than a unit-test context. Done means the integration tests run without the missing transactionManager error.

Written by the indexing model from the issue text.