Made sure order of counters is consistent

Because we might need to iterate on them (and because the eventSet is
actually a list). We want to make sure the counters are not mixed up.

core/src/main/kotlin/se/lth/cs/papicounters/EventSetBuilder.kt

@@ -10,7 +10,7 @@ import java.lang.RuntimeException
  */
 class EventSetBuilder(val availableCounters : List<PAPICounter>) : FeatureVisitor {
 
-    private var counterSet : MutableSet<PAPICounter> = mutableSetOf()
+    private var counterSet : LinkedHashSet<PAPICounter> = java.util.LinkedHashSet()
 
     override fun visitPAPICounter(c: PAPICounter) {
         counterSet.add(c)

core/src/main/kotlin/se/lth/cs/util/Experiment.kt

+package se.lth.cs.util
+
+class Experiment {
+}
\ No newline at end of file

core/src/test/kotlin/ExperimentTest.kt

+class ExperimentTest {
+}
\ No newline at end of file