Update to Hibernate 5.6.15.Final

Closes gh-737

Author: jzheaux

dependencies/build.gradle

@@ -49,7 +49,7 @@ dependencies {
 		api "org.assertj:assertj-core:3.23.1"
 		api "org.easymock:easymock:4.3"
 		api "org.freemarker:freemarker:2.3.32"
-		api "org.hibernate:hibernate-core-jakarta:5.6.12.Final"
+		api "org.hibernate:hibernate-core-jakarta:5.6.15.Final"
 		api "org.hsqldb:hsqldb:2.7.0"
 		api "junit:junit:4.13.2"
 		api "org.mockito:mockito-core:4.8.0"