title: @CreationTimestamp and @UpdateTimestamp is not working with LocalDateTime
body: <p>I am trying to use <code>@CreationTimestamp</code> and <code>@UpdateTimestamp</code> with <code>LocalDateTime</code> type, but it is giving me <code>org.hibernate.HibernateException:</code> Unsupported property type for generator annotation <code>@CreationTimestamp</code> exception.</p>
  
  <p>I am using 5.0.12.hibernate version with java 8 <code>LocalDataTime</code>, </p>
  
  <p>Is there any way to use <code>@UpdateTimestamp</code> and <code>@CreationTimestamp</code> with Java 8 <code>LocalDateTime</code> ?</p>
  
  <pre><code> org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Unsupported property type for generator annotation @CreationTimestamp
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1628)
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555)
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
      at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
      at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
      at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
      at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
      at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1080)
      at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:857)
      at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543)
      at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)
      at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693)
      at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360)
      at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
      at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118)
      at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107)
      at com.godigit.MotorDataService.main(MotorDataService.java:35)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:498)
      at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49)
  Caused by: org.hibernate.HibernateException: Unsupported property type for generator annotation @CreationTimestamp
      at org.hibernate.tuple.CreationTimestampGeneration.initialize(CreationTimestampGeneration.java:44)
      at org.hibernate.tuple.CreationTimestampGeneration.initialize(CreationTimestampGeneration.java:22)
      at org.hibernate.cfg.annotations.PropertyBinder.instantiateAndInitializeValueGeneration(PropertyBinder.java:415)
      at org.hibernate.cfg.annotations.PropertyBinder.getValueGenerationFromAnnotation(PropertyBinder.java:383)
      at org.hibernate.cfg.annotations.PropertyBinder.getValueGenerationFromAnnotations(PropertyBinder.java:348)
      at org.hibernate.cfg.annotations.PropertyBinder.determineValueGenerationStrategy(PropertyBinder.java:323)
      at org.hibernate.cfg.annotations.PropertyBinder.makeProperty(PropertyBinder.java:269)
      at org.hibernate.cfg.annotations.PropertyBinder.makePropertyAndValue(PropertyBinder.java:189)
      at org.hibernate.cfg.annotations.PropertyBinder.makePropertyValueAndBind(PropertyBinder.java:199)
      at org.hibernate.cfg.AnnotationBinder.processElementAnnotations(AnnotationBinder.java:2225)
      at org.hibernate.cfg.AnnotationBinder.processIdPropertiesIfNotAlready(AnnotationBinder.java:911)
      at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:738)
      at org.hibernate.boot.model.source.internal.annotations.AnnotationMetadataSourceProcessorImpl.processEntityHierarchies(AnnotationMetadataSourceProcessorImpl.java:245)
      at org.hibernate.boot.model.process.spi.MetadataBuildingProcess$1.processEntityHierarchies(MetadataBuildingProcess.java:222)
      at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:265)
      at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:847)
      at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:874)
      at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:60)
      at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:360)
      at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:382)
      at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:371)
      at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:336)
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687)
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624)
      ... 21 common frames omitted
  </code></pre>