Moved report to a trait so it can be extended by magpie2

shiva/src/main/scala/nl/lumc/sasc/biopet/pipelines/shiva/ShivaReport.scala

@@ -32,7 +32,10 @@ class ShivaReport(val root: Configurable) extends ReportBuilderExtension {
 }
 
 /** Object for report generation for Shiva pipeline */
-object ShivaReport extends MultisampleMappingReportTrait {
+object ShivaReport extends ShivaReportTrait
+
+/** Trait for report generation for Shiva pipeline, this can be extended */
+trait ShivaReportTrait extends MultisampleMappingReportTrait  {
 
   def variantcallingExecuted = summary.getValue("shiva", "settings", "multisample_variantcalling") match {
     case Some(true) => true