fix: date format has changed in fabric8 5.9

Author: metacosm

Diff for: operator-framework-core/src/test/java/io/javaoperatorsdk/operator/processing/event/internal/CustomResourceSelectorTest.java

@@ -1,8 +1,7 @@
 package io.javaoperatorsdk.operator.processing.event.internal;
 
 import java.text.ParseException;
-import java.time.LocalDateTime;
-import java.time.format.DateTimeFormatter;
+import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
@@ -17,6 +16,7 @@
 import io.fabric8.kubernetes.api.model.ObjectMetaBuilder;
 import io.fabric8.kubernetes.client.KubernetesClient;
 import io.fabric8.kubernetes.client.VersionInfo;
+import io.fabric8.kubernetes.client.VersionInfo.VersionKeys;
 import io.fabric8.kubernetes.client.server.mock.EnableKubernetesMockClient;
 import io.fabric8.kubernetes.client.server.mock.KubernetesMockServer;
 import io.javaoperatorsdk.operator.Operator;
@@ -50,9 +50,7 @@ public class CustomResourceSelectorTest {
   @SuppressWarnings("unchecked")
   @BeforeEach
   void setUpResources() throws ParseException {
-    String buildDate =
-        DateTimeFormatter.ofPattern(VersionInfo.VersionKeys.BUILD_DATE_FORMAT)
-            .format(LocalDateTime.now());
+    String buildDate = new SimpleDateFormat(VersionKeys.BUILD_DATE_FORMAT).format(new Date());
 
     server
         .expect()