feat: Add the possibility to update the default handler for the Global Resource Property Registry. (#5963) (#6323)

* feat: Add possibility to re-set default handler for Global Resource Property Registry.

* feat: Add not null check for defaultHandler param.

(cherry picked from commit 183caca)

Co-authored-by: armory-abedonik <106548537+armory-abedonik@users.noreply.github.com>

Author: mergify[bot]

clouddriver-kubernetes/src/main/java/com/netflix/spinnaker/clouddriver/kubernetes/description/GlobalResourcePropertyRegistry.java

@@ -36,7 +36,7 @@ public class GlobalResourcePropertyRegistry implements ResourcePropertyRegistry
   private final ImmutableMap<KubernetesKind, KubernetesResourceProperties> globalProperties;
   private ImmutableMap<KubernetesKind, KubernetesResourceProperties> crdProperties =
       ImmutableMap.of();
-  private final KubernetesResourceProperties defaultProperties;
+  private KubernetesResourceProperties defaultProperties;
 
   @Autowired
   public GlobalResourcePropertyRegistry(
@@ -52,6 +52,12 @@ public GlobalResourcePropertyRegistry(
         new KubernetesResourceProperties(defaultHandler, defaultHandler.versioned());
   }
 
+  public void setDefaultHandler(
+      @Nonnull KubernetesUnregisteredCustomResourceHandler defaultHandler) {
+    this.defaultProperties =
+        new KubernetesResourceProperties(defaultHandler, defaultHandler.versioned());
+  }
+
   public void updateCrdProperties(List<KubernetesHandler> handlers) {
     this.crdProperties =
         handlers.stream()