[dependency]: bump hibernate-entitymanager in /nis

Bumps [hibernate-entitymanager](https://github.com/hibernate/hibernate-orm) from 4.3.11.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@4.3.11.Final...5.6.15)

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

Signed-off-by: dependabot[bot] <support@github.com>

nis/pom.xml

@@ -179,7 +179,7 @@
         <dependency>
             <groupId>org.hibernate</groupId>
             <artifactId>hibernate-entitymanager</artifactId>
-            <version>4.3.11.Final</version>
+            <version>5.6.15.Final</version>
         </dependency>
         <dependency>
             <groupId>org.hibernate</groupId>