Align JPA sample with Hibernate 5.1’s table naming

The name of the table for a many-to-many relationship has changed in
Hibernate 5.1.

This commit updates the JPA sample’s import.sql accordingly. It also
updates the repository integration tests to verify that the data has
been imported successfully.

Closes gh-5880

spring-boot-samples/spring-boot-sample-jpa/src/test/java/sample/jpa/repository/JpaNoteRepositoryIntegrationTests.java

@@ -24,6 +24,7 @@ import sample.jpa.domain.Note;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.transaction.annotation.Transactional;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -34,6 +35,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  */
 @RunWith(SpringRunner.class)
 @SpringBootTest
+@Transactional
 public class JpaNoteRepositoryIntegrationTests {
 
 	@Autowired
@@ -43,6 +45,9 @@ public class JpaNoteRepositoryIntegrationTests {
 	public void findsAllNotes() {
 		List<Note> notes = this.repository.findAll();
 		assertThat(notes).hasSize(4);
+		for (Note note : notes) {
+			assertThat(note.getTags().size()).isGreaterThan(0);
+		}
 	}
 
 }

spring-boot-samples/spring-boot-sample-jpa/src/test/java/sample/jpa/repository/JpaTagRepositoryIntegrationTests.java

@@ -24,6 +24,7 @@ import sample.jpa.domain.Tag;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.transaction.annotation.Transactional;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -34,6 +35,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  */
 @RunWith(SpringRunner.class)
 @SpringBootTest
+@Transactional
 public class JpaTagRepositoryIntegrationTests {
 
 	@Autowired
@@ -43,6 +45,9 @@ public class JpaTagRepositoryIntegrationTests {
 	public void findsAllTags() {
 		List<Tag> tags = this.repository.findAll();
 		assertThat(tags).hasSize(3);
+		for (Tag tag : tags) {
+			assertThat(tag.getNotes().size()).isGreaterThan(0);
+		}
 	}
 
 }