use newer hibernate 5.2.12

the latest release spring-starter-data-jpa uses an older hibernate version (5.0.12) that does not support java8 features like time and date.

we use this to override it with our own dependency as long as spring-boot uses the old one.

pom.xml

@@ -44,6 +44,18 @@
 			<artifactId>spring-boot-starter-web</artifactId>
 		</dependency>
 
+		<!-- override sping-data-jpa hibernate (5.0.12)
+		it is too old and does not correctly use java8 time
+		5.2.12 fixes this
+
+		 remove when updating spring-boot (to 2.0)
+		   -->
+		<dependency>
+			<groupId>org.hibernate</groupId>
+			<artifactId>hibernate-core</artifactId>
+			<version>5.2.12.Final</version>
+		</dependency>
+
 		<!-- DataSources -->
 		<dependency>
 			<groupId>mysql</groupId>