Change memory of SeqStat

public/biopet-framework/src/main/scala/nl/lumc/sasc/biopet/tools/Seqstat.scala

@@ -38,8 +38,8 @@ class Seqstat(val root: Configurable) extends BiopetJavaCommandLineFunction with
   @Output(doc = "Output JSON", shortName = "output", required = true)
   var output: File = null
 
-  override val defaultVmem = "4G"
-  memoryLimit = Option(3.0)
+  override val defaultVmem = "3G"
+  memoryLimit = Option(1.0)
 
   override def commandLine = super.commandLine + required("-i", input) + " > " + required(output)