Merge branch 'fix_mapping_summary' into 'develop'

fix mapping summary

See #348. Do not merge until shiva summary in shemas repo is done. 

See merge request !409

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

@@ -128,7 +128,7 @@ class Mapping(val root: Configurable) extends QScript with SummaryQScript with S
     "skip_markduplicates" -> skipMarkduplicates,
     "aligner" -> aligner,
     "chunking" -> chunking,
-    "numberChunks" -> (if (chunking) numberChunks.getOrElse(1) else None)
+    "number_of_chunks" -> (if (chunking) numberChunks.getOrElse(1) else None)
   ) ++ (if (root == null) Map("reference" -> referenceSummary) else Map())
 
   override def reportClass = {