debug gradle tests

test.gradle

```
    println "main.java.files = ${sourceSets.main.java.files.name}"
    println "test.java.files = ${sourceSets.test.java.files.name}"
    println "main.output.classesDir = ${sourceSets.main.output.classesDir}"
    println "test.output.classesDir = ${sourceSets.test.output.classesDir}"
    println "main.java.srcDirs = ${sourceSets.main.java.srcDirs}"
    println "test.java.srcDirs = ${sourceSets.test.java.srcDirs}"
    println "main.resources.srcDirs = ${sourceSets.main.resources.srcDirs}"
    println "test.resources.srcDirs = ${sourceSets.test.resources.srcDirs}"
    println "main.allSource.files = ${sourceSets.main.allSource.files}"
    println "test.allSource.files = ${sourceSets.test.allSource.files}"
    println "classpath " + classpath.each{println it}
```