switch java requirment to general reportbuilder

public/biopet-framework/src/main/scala/nl/lumc/sasc/biopet/core/report/ReportBuilder.scala

@@ -25,6 +25,8 @@ trait ReportBuilderExtension extends ToolCommandFuntion {
   /** Arguments that are passed on the commandline */
   var args: Map[String, String] = Map()
 
+  override val defaultCoreMemory = 3.0
+
   override def beforeGraph: Unit = {
     super.beforeGraph
     jobOutputFile = new File(outputDir, ".report.log.out")

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

@@ -14,8 +14,6 @@ import nl.lumc.sasc.biopet.pipelines.flexiprep.FlexiprepReport
  */
 class ShivaReport(val root: Configurable) extends ReportBuilderExtension {
   val builder = ShivaReport
-
-  override val defaultCoreMemory = 3.0
 }
 
 /** Object for report generation for Shiva pipeline */