Simplify dbsnp

biopet-core/src/main/scala/nl/lumc/sasc/biopet/core/Reference.scala

@@ -58,9 +58,9 @@ trait Reference extends Configurable {
   }
 
   lazy val geneAnnotationVersion: Option[String] = config("gene_annotation_name")
-  lazy val geneAnnotationSubPath = geneAnnotationVersion.map(x => List("gene_annotations", x)).getOrElse(Nil)
-  lazy val dbsnpVersion: Option[Int] = config("dbsnp_version")
-  lazy val dbsnpSubPath: List[String] = dbsnpVersion.map(x => List("dbsnp_annotations", x.toString)).getOrElse(Nil)
+  lazy val geneAnnotationSubPath = geneAnnotationVersion.map(List("gene_annotations", _)).getOrElse(Nil)
+  lazy val dbsnpVersion: Option[String] = config("dbsnp_version")
+  lazy val dbsnpSubPath: List[String] = dbsnpVersion.map(List("dbsnp_annotations", _)).getOrElse(Nil)
   def dbsnpVcfFile: Option[File] = config("dbsnp_vcf", extraSubPath = dbsnpSubPath)
 
   /** Returns the reference config path */