Add nullability annotations to tests in module/spring-boot-data-jdbc-test

See gh-47263

Author: mhalbritter

module/spring-boot-data-jdbc-test/build.gradle

@@ -38,3 +38,7 @@ dependencies {
 	testRuntimeOnly("com.h2database:h2")
 	testRuntimeOnly("org.hsqldb:hsqldb")
 }
+
+tasks.named("compileTestJava") {
+	options.nullability.checking = "tests"
+}

module/spring-boot-data-jdbc-test/src/test/java/org/springframework/boot/data/jdbc/test/autoconfigure/ExampleEntity.java

@@ -28,6 +28,7 @@
 public class ExampleEntity {
 
 	@Id
+	@SuppressWarnings("NullAway.Init")
 	private Long id;
 
 	private final String name;