Bump version.hibernate from 3.6.10.Final to 5.6.15.Final

Bumps `version.hibernate` from 3.6.10.Final to 5.6.15.Final.

Updates `org.hibernate:hibernate-core` from 3.6.10.Final to 5.6.15.Final
- [Release notes](https://github.com/hibernate/hibernate-orm/releases)
- [Changelog](https://github.com/hibernate/hibernate-orm/blob/5.6.15/changelog.txt)
- [Commits](hibernate/hibernate-orm@3.6.10.Final...5.6.15)

Updates `org.hibernate:hibernate-entitymanager` from 3.6.10.Final to 5.6.15.Final
- [Release notes](https://github.com/hibernate/hibernate-orm/releases)
- [Changelog](https://github.com/hibernate/hibernate-orm/blob/5.6.15/changelog.txt)
- [Commits](hibernate/hibernate-orm@3.6.10.Final...5.6.15)

---
updated-dependencies:
- dependency-name: org.hibernate:hibernate-core
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.hibernate:hibernate-entitymanager
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -1243,7 +1243,7 @@
         <version.apacheds>2.0.0.AM27</version.apacheds>
         <version.fluido>2.0.0-M8</version.fluido>
         <!-- hibernate is up to rev 6+. But 4.0.0. causes this error: symbol: org.hibernate.classic.Session not found -->
-        <version.hibernate>3.6.10.Final</version.hibernate>
+        <version.hibernate>5.6.15.Final</version.hibernate>
         <version.spotbugs.maven>4.8.6.6</version.spotbugs.maven>
         <version.spotbugs>4.8.4</version.spotbugs>
         <!-- Spring 6.x requires Java 17 -->