Upgrade to Hibernate 5.2

See gh-6111

spring-boot-autoconfigure/pom.xml

@@ -257,7 +257,7 @@
 		</dependency>
 		<dependency>
 			<groupId>org.hibernate</groupId>
-			<artifactId>hibernate-entitymanager</artifactId>
+			<artifactId>hibernate-core</artifactId>
 			<optional>true</optional>
 		</dependency>
 		<dependency>

spring-boot-dependencies/pom.xml

@@ -82,7 +82,7 @@
 		<h2.version>1.4.192</h2.version>
 		<hamcrest.version>1.3</hamcrest.version>
 		<hazelcast.version>3.6.3</hazelcast.version>
-		<hibernate.version>5.1.0.Final</hibernate.version>
+		<hibernate.version>5.2.0.Final</hibernate.version>
 		<hibernate-validator.version>5.2.4.Final</hibernate-validator.version>
 		<hikaricp.version>2.4.6</hikaricp.version>
 		<hikaricp-java6.version>2.3.13</hikaricp-java6.version>
@@ -1717,21 +1717,11 @@
 				<artifactId>hibernate-ehcache</artifactId>
 				<version>${hibernate.version}</version>
 			</dependency>
-			<dependency>
-				<groupId>org.hibernate</groupId>
-				<artifactId>hibernate-entitymanager</artifactId>
-				<version>${hibernate.version}</version>
-			</dependency>
 			<dependency>
 				<groupId>org.hibernate</groupId>
 				<artifactId>hibernate-envers</artifactId>
 				<version>${hibernate.version}</version>
 			</dependency>
-			<dependency>
-				<groupId>org.hibernate</groupId>
-				<artifactId>hibernate-java8</artifactId>
-				<version>${hibernate.version}</version>
-			</dependency>
 			<dependency>
 				<groupId>org.hibernate</groupId>
 				<artifactId>hibernate-jpamodelgen</artifactId>

spring-boot-devtools/pom.xml

@@ -51,7 +51,7 @@
 		</dependency>
 		<dependency>
 			<groupId>org.hibernate</groupId>
-			<artifactId>hibernate-entitymanager</artifactId>
+			<artifactId>hibernate-core</artifactId>
 			<optional>true</optional>
 		</dependency>
 		<dependency>

spring-boot-docs/pom.xml

@@ -442,7 +442,7 @@
 		</dependency>
 		<dependency>
 			<groupId>org.hibernate</groupId>
-			<artifactId>hibernate-entitymanager</artifactId>
+			<artifactId>hibernate-core</artifactId>
 			<optional>true</optional>
 		</dependency>
 		<dependency>

spring-boot-docs/src/main/asciidoc/spring-boot-features.adoc

@@ -2629,6 +2629,28 @@ http://spring.io/guides/gs/accessing-data-jpa/['`Accessing Data with JPA`'] guid
 http://spring.io and read the http://projects.spring.io/spring-data-jpa/[Spring Data JPA]
 and  http://hibernate.org/orm/documentation/[Hibernate] reference documentation.
 
+[NOTE]
+====
+As of Hibernate 5.2, the `hibernate-entitymanager` module has been merged in
+`hibernate-core`. If you need to downgrade, you'll have to add `hibernate-entitymanager`
+yourself, something like:
+
+```xml
+<dependency>
+	<groupId>org.springframework.boot</groupId>
+	<artifactId>spring-boot-starter-data-jpa</artifactId>
+</dependency>
+<dependency>
+	<groupId>org.hibernate</groupId>
+	<artifactId>hibernate-entitymanager</artifactId>
+	<version>${hibernate.version}</version>
+</dependency>
+```
+
+As Hibernate does not bundle the `hibernate-entitymanager` and `hibernate-java8`
+artifacts anymore, Spring Boot doesn't provide dependency management for them.
+====
+
 
 
 [[boot-features-entity-classes]]

spring-boot-samples/spring-boot-sample-hibernate4/pom.xml

@@ -24,6 +24,11 @@
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-data-jpa</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>org.hibernate</groupId>
+			<artifactId>hibernate-entitymanager</artifactId>
+			<version>${hibernate.version}</version>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-web</artifactId>

spring-boot-samples/spring-boot-sample-jpa/pom.xml

@@ -25,7 +25,7 @@
 		</dependency>
 		<dependency>
 			<groupId>org.hibernate</groupId>
-			<artifactId>hibernate-entitymanager</artifactId>
+			<artifactId>hibernate-core</artifactId>
 		</dependency>
 		<dependency>
 			<groupId>com.h2database</groupId>

spring-boot-starters/spring-boot-starter-data-jpa/pom.xml

@@ -32,7 +32,7 @@
 		</dependency>
 		<dependency>
 			<groupId>org.hibernate</groupId>
-			<artifactId>hibernate-entitymanager</artifactId>
+			<artifactId>hibernate-core</artifactId>
 			<exclusions>
 				<exclusion>
 					<groupId>org.apache.geronimo.specs</groupId>

spring-boot-test-autoconfigure/pom.xml

@@ -56,7 +56,7 @@
 		</dependency>
 		<dependency>
 			<groupId>org.hibernate</groupId>
-			<artifactId>hibernate-entitymanager</artifactId>
+			<artifactId>hibernate-core</artifactId>
 			<exclusions>
 				<exclusion>
 					<groupId>org.jboss.spec.javax.transaction</groupId>

spring-boot/pom.xml

@@ -171,7 +171,7 @@
 		</dependency>
 		<dependency>
 			<groupId>org.hibernate</groupId>
-			<artifactId>hibernate-entitymanager</artifactId>
+			<artifactId>hibernate-core</artifactId>
 			<optional>true</optional>
 		</dependency>
 		<dependency>