Fix samples dir

public/gentrap/src/main/scala/nl/lumc/sasc/biopet/pipelines/gentrap/Gentrap.scala

@@ -403,7 +403,7 @@ class Gentrap(val root: Configurable) extends QScript
     protected def pipeline: Gentrap = qscript
 
     /** Sample output directory */
-    override def sampleDir: File = new File(outputDir, "sample_" + sampleId)
+    override def sampleDir: File = new File(outputDir, "samples" + File.separator + sampleId)
 
     /** Summary stats of the sample */
     def summaryStats: Map[String, Any] = Map(