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kotlinlang

moreover I had `spring-transaction` module of Exposed in my `build.gradle`
```
    // Exposed - type-safe SQL DSL for Kotlin
    //   <https://github.com/JetBrains/Exposed>
    //   <https://spring.io/blog/2016/03/20/a-geospatial-messenger-with-kotlin-spring-boot-and-postgresql>
    compile group: 'org.jetbrains.exposed', name: 'exposed', version: '0.7.4'
    compile group: 'org.jetbrains.exposed', name: 'spring-transaction', '0.7.4'
```