improve: cleaner throws Exception (#2527)

Signed-off-by: Attila Mészáros <[email protected]>

Author: csviri

Diff for: operator-framework-core/src/main/java/io/javaoperatorsdk/operator/api/reconciler/Cleaner.java

@@ -27,6 +27,6 @@ public interface Cleaner<P extends HasMetadata> {
    *         that it can be safely deleted.
    * @see DeleteControl#noFinalizerRemoval()
    */
-  DeleteControl cleanup(P resource, Context<P> context);
+  DeleteControl cleanup(P resource, Context<P> context) throws Exception;
 
 }

Diff for: operator-framework-core/src/main/java/io/javaoperatorsdk/operator/processing/Controller.java

@@ -188,7 +188,7 @@ public Map<String, Object> metadata() {
             }
 
             @Override
-            public DeleteControl execute() {
+            public DeleteControl execute() throws Exception {
               initContextIfNeeded(resource, context);
               WorkflowCleanupResult workflowCleanupResult = null;