Make JDBC-based batch configurer back off without a DataSource

Closes gh-17449

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/batch/BatchConfigurerConfiguration.java

@@ -40,6 +40,7 @@ import org.springframework.transaction.PlatformTransactionManager;
 class BatchConfigurerConfiguration {
 
 	@Configuration
+	@ConditionalOnBean(DataSource.class)
 	@ConditionalOnMissingBean(name = "entityManagerFactory")
 	static class JdbcBatchConfiguration {
 

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/batch/BatchAutoConfigurationTests.java

@@ -89,7 +89,13 @@ public class BatchAutoConfigurationTests {
 	}
 
 	@Test
-	public void testNoDatabase() {
+	public void whenThereIsNoDataSourceAutoConfigurationBacksOff() {
+		this.contextRunner.withUserConfiguration(TestConfiguration.class)
+				.run((context) -> assertThat(context).doesNotHaveBean(BatchConfigurer.class));
+	}
+
+	@Test
+	public void testCustomConfigurationWithNoDatabase() {
 		this.contextRunner.withUserConfiguration(TestCustomConfiguration.class).run((context) -> {
 			assertThat(context).hasSingleBean(JobLauncher.class);
 			JobExplorer explorer = context.getBean(JobExplorer.class);