Ensure Kotlin JMH folder is imported as test folder in Eclipse
Ensure Kotlin JMH folder is imported as test folder in Eclipse

Commit 9a180d1811866b2abe8c2888cf7a3439d965c800 introduced Kotlin-based
JMH benchmarks which prevent spring-beans from being imported into the
Eclipse IDE.

This commit ensures that src/jmh/kotlin is imported in Eclipse with the
"test" attribute set.

See gh-24104

spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework