fix: controllers need to be annotated with @controller

The reason for this is that the default configuration service relies
on these annotations to be present to do its work.
Note: Quarkus applications don't need to be annotated if no changes to
the default configuration is needed.

Author: metacosm

samples/mysql-schema/src/main/java/io/javaoperatorsdk/operator/sample/SchemaController.java

@@ -6,6 +6,7 @@
 import io.fabric8.kubernetes.api.model.SecretBuilder;
 import io.fabric8.kubernetes.client.KubernetesClient;
 import io.javaoperatorsdk.operator.api.Context;
+import io.javaoperatorsdk.operator.api.Controller;
 import io.javaoperatorsdk.operator.api.DeleteControl;
 import io.javaoperatorsdk.operator.api.ResourceController;
 import io.javaoperatorsdk.operator.api.UpdateControl;
@@ -20,6 +21,7 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+@Controller
 public class SchemaController implements ResourceController<Schema> {
   static final String USERNAME_FORMAT = "%s-user";
   static final String SECRET_FORMAT = "%s-secret";

samples/tomcat/src/main/java/io/javaoperatorsdk/operator/sample/TomcatController.java

@@ -10,6 +10,7 @@
 import io.fabric8.kubernetes.client.dsl.ServiceResource;
 import io.fabric8.kubernetes.client.utils.Serialization;
 import io.javaoperatorsdk.operator.api.Context;
+import io.javaoperatorsdk.operator.api.Controller;
 import io.javaoperatorsdk.operator.api.DeleteControl;
 import io.javaoperatorsdk.operator.api.ResourceController;
 import io.javaoperatorsdk.operator.api.UpdateControl;
@@ -23,6 +24,7 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+@Controller
 public class TomcatController implements ResourceController<Tomcat> {
 
   private final Logger log = LoggerFactory.getLogger(getClass());

samples/tomcat/src/main/java/io/javaoperatorsdk/operator/sample/WebappController.java

@@ -4,6 +4,7 @@
 import io.fabric8.kubernetes.api.model.apps.Deployment;
 import io.fabric8.kubernetes.client.KubernetesClient;
 import io.javaoperatorsdk.operator.api.Context;
+import io.javaoperatorsdk.operator.api.Controller;
 import io.javaoperatorsdk.operator.api.DeleteControl;
 import io.javaoperatorsdk.operator.api.ResourceController;
 import io.javaoperatorsdk.operator.api.UpdateControl;
@@ -15,6 +16,7 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+@Controller
 public class WebappController implements ResourceController<Webapp> {
 
   private KubernetesClient kubernetesClient;