Chore: Add Keycloak model as a dependency to crd-generator tests

And generate crd from it to verify that it can be done without StackOverwlows and other errors.
No other verifications are performed.

crd-generator/test/pom.xml

@@ -46,6 +46,13 @@
       <artifactId>validation-api</artifactId>
       <scope>test</scope>
     </dependency>
+
+    <!-- Keycloak model for testing -->
+    <dependency>
+      <groupId>org.keycloak</groupId>
+      <artifactId>keycloak-core</artifactId>
+      <scope>test</scope>
+    </dependency>
 
   </dependencies>
   <build>

crd-generator/test/src/test/java/io/fabric8/crd/generator/keycloak/KeycloakRealm.java

@@ -0,0 +1,38 @@
+/**
+ * Copyright (C) 2015 Red Hat, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.fabric8.crd.generator.keycloak;
+
+import org.keycloak.representations.idm.ComponentExportRepresentation;
+import org.keycloak.representations.idm.GroupRepresentation;
+import org.keycloak.representations.idm.RealmRepresentation;
+import org.keycloak.representations.idm.authorization.ScopeRepresentation;
+
+import io.fabric8.crd.generator.annotation.SchemaSwap;
+import io.fabric8.kubernetes.api.model.Namespaced;
+import io.fabric8.kubernetes.client.CustomResource;
+import io.fabric8.kubernetes.model.annotation.Group;
+import io.fabric8.kubernetes.model.annotation.Version;
+
+@Group("sample.fabric8.io")
+@Version("v1alpha1")
+@SchemaSwap(originalType = ComponentExportRepresentation.class, fieldName = "subComponents")
+@SchemaSwap(originalType = GroupRepresentation.class, fieldName = "subGroups")
+@SchemaSwap(originalType = ScopeRepresentation.class, fieldName = "policies")
+@SchemaSwap(originalType = ScopeRepresentation.class, fieldName = "resources")
+public class KeycloakRealm extends CustomResource<RealmRepresentation, Void> implements Namespaced {
+
+}

crd-generator/test/src/test/java/io/fabric8/crd/generator/keycloak/KeycloakRealmCRDTest.java

@@ -0,0 +1,38 @@
+/**
+ * Copyright (C) 2015 Red Hat, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.fabric8.crd.generator.keycloak;
+
+import io.fabric8.kubernetes.api.model.apiextensions.v1.CustomResourceDefinition;
+import io.fabric8.kubernetes.api.model.apiextensions.v1.CustomResourceDefinitionVersion;
+import io.fabric8.kubernetes.api.model.apiextensions.v1.JSONSchemaProps;
+import io.fabric8.kubernetes.client.utils.Serialization;
+import org.junit.jupiter.api.Test;
+
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+class KeycloakRealmCRDTest {
+
+  @Test
+  void testCrd() {
+    CustomResourceDefinition d = Serialization.unmarshal(getClass().getClassLoader()
+        .getResourceAsStream("META-INF/fabric8/keycloakrealms.sample.fabric8.io-v1.yml"),
+      CustomResourceDefinition.class);
+    assertNotNull(d); // just make sure it generates
+  }
+}

pom.xml

@@ -100,6 +100,8 @@
     <awaitility.version>4.2.0</awaitility.version>
     <approvaltests.version>18.5.0</approvaltests.version>
     <mockito.version>4.8.0</mockito.version>
+    <!-- Keycloak model version for crd-generator testing -->
+    <keycloak.version>19.0.3</keycloak.version>
 
     <conscrypt-openjdk-uber.bundle.version>1.4.2_1</conscrypt-openjdk-uber.bundle.version>
     <generex.version>1.0.2</generex.version>
@@ -841,6 +843,14 @@
         <version>${approvaltests.version}</version>
         <scope>test</scope>
       </dependency>
+
+      <!-- Keycloak model for crd-generator testing -->
+      <dependency>
+        <groupId>org.keycloak</groupId>
+        <artifactId>keycloak-core</artifactId>
+        <version>${keycloak.version}</version>
+        <scope>test</scope>
+      </dependency>
     </dependencies>
   </dependencyManagement>