naming fixes

Author: csviri

operator-framework-core/src/main/java/io/javaoperatorsdk/operator/api/config/ControllerConfigurationOverrider.java

@@ -161,7 +161,8 @@ public ControllerConfigurationOverrider<R> withGenericFilter(GenericFilter<R> ge
     return this;
   }
 
-  public ControllerConfigurationOverrider<R> withItemStore(UnaryOperator<R> cachePruneFunction) {
+  public ControllerConfigurationOverrider<R> withCachePruneFunction(
+      UnaryOperator<R> cachePruneFunction) {
     this.cachePruneFunction = cachePruneFunction;
     return this;
   }

operator-framework-core/src/main/java/io/javaoperatorsdk/operator/api/config/informer/InformerConfiguration.java

@@ -213,8 +213,9 @@ public InformerConfigurationBuilder<R> withGenericFilter(GenericFilter<R> generi
       return this;
     }
 
-    public InformerConfigurationBuilder<R> withCachePruneFunction(UnaryOperator<R> itemStore) {
-      this.cachePruneFunction = itemStore;
+    public InformerConfigurationBuilder<R> withCachePruneFunction(
+        UnaryOperator<R> cachePruneFunction) {
+      this.cachePruneFunction = cachePruneFunction;
       return this;
     }