fix: only keep **not** blank finalizer, not blank ones… 🤦

Author: metacosm

operator-framework/src/main/java/io/javaoperatorsdk/operator/config/runtime/AnnotationConfiguration.java

@@ -7,6 +7,7 @@
 import io.javaoperatorsdk.operator.api.config.ControllerConfiguration;
 import java.util.Optional;
 import java.util.Set;
+import java.util.function.Predicate;
 
 public class AnnotationConfiguration<R extends CustomResource>
     implements ControllerConfiguration<R> {
@@ -33,7 +34,7 @@ public String getCRDName() {
   public String getFinalizer() {
     return annotation
         .map(Controller::finalizerName)
-        .filter(String::isBlank)
+        .filter(Predicate.not(String::isBlank))
         .orElse(ControllerUtils.getDefaultFinalizerName(getCRDName()));
   }