Force no flexiprep in gears

mapping/src/main/scala/nl/lumc/sasc/biopet/pipelines/mapping/MultisampleMapping.scala

@@ -67,6 +67,8 @@ trait MultisampleMappingTrait extends MultiSampleQScript
 
   override def defaults = super.defaults ++ Map("reordersam" -> Map("allow_incomplete_dict_concordance" -> true))
 
+  override def fixedValues = Map("gearssingle" -> Map("skip_flexiprep" -> true))
+
   /** In a default multisample mapping run there are no multsample jobs. This method can be overriden by other pipelines */
   def addMultiSampleJobs(): Unit = {
     // this code will be executed after all code of all samples is executed