Fix bug in StatsMaps for events without a state

Author: hazefully

fdb-record-layer-core/src/main/java/com/apple/foundationdb/record/query/plan/cascades/debug/LightweightDebugger.java

@@ -85,6 +85,8 @@ public void onShow(@Nonnull final Reference ref) {
 
     @Override
     public void onQuery(@Nonnull final String recordQuery, @Nonnull final PlanContext planContext) {
+        reset();
+
         this.queryAsString = recordQuery;
         this.planContext = planContext;
 

fdb-record-layer-core/src/main/java/com/apple/foundationdb/record/query/plan/cascades/debug/StatsMaps.java

@@ -75,7 +75,7 @@ public Map<Class<? extends CascadesRule<?>>, Stats> getPlannerRuleClassStatsMap(
 
     @Nonnull
     public Map<Class<? extends Debugger.Event>, Stats> getEventWithoutStateClassStatsMap() {
-        return immutableEventClassStatsMapSupplier.get();
+        return immutableEventWithoutStateClassStatsMapSupplier.get();
     }
 
     @Nonnull