Revert "Merge branch 'renovate/org.hibernate-hibernate-core-6.x' into 'renovate-updates'"

This reverts merge request !143

pom.xml

@@ -148,7 +148,7 @@
         <dependency>
             <groupId>org.hibernate</groupId>
             <artifactId>hibernate-core</artifactId>
-            <version>6.4.1.Final</version>
+            <version>5.6.15.Final</version>
             <exclusions>
                 <exclusion>
                     <groupId>org.dom4j</groupId>