[#1974] Set Hibernate ORM gradle plugin to 6.6.0.CR2

The 6.6.0.Final version is not compatible with JDK 11

Author: DavideD

gradle.properties

@@ -40,7 +40,7 @@ org.gradle.java.installations.auto-download=false
 # Override default Hibernate ORM Gradle plugin version
 # Using the stable version because I don't know how to configure the build to download the snapshot version from
 # a remote repository
-#hibernateOrmGradlePluginVersion = 6.6.0.Final
+hibernateOrmGradlePluginVersion = 6.6.0.CR2
 
 # If set to true, skip Hibernate ORM version parsing (default is true, if set to null)
 # this is required when using intervals or weird versions or the build will fail