add unit test to reconciler

pom.xml

src/main/java/de/ozgcloud/operator/Config.java

...de/ozgcloud/operator/keycloak/KeycloakUserReconciler.java

.../java/de/ozgcloud/operator/keycloak/KeycloakUserSpec.java

...ava/de/ozgcloud/operator/OzgOperatorApplicationTests.java

...zgcloud/operator/keycloak/KeycloakUserReconcilerTest.java

...gcloud/operator/keycloak/KeycloakUserSpecTestFactory.java

...loud/operator/keycloak/KeycloakUserStatusTestFactory.java

...e/ozgcloud/operator/keycloak/KeycloakUserTestFactory.java

src/test/resources/KeycloakUserTest.yaml

src/test/resources/application.yaml