check if downgrade of hibernate is needed

[tibistibi]

there was a downgrade added but not sure if this is needed:

    <!-- 
        Downgrading hibernate version solves a cascade error. We have different behavior with
        the same source code. It works in 4.1.2.Final and doesn't work in 4.1.8.Final. More info:
        https://forum.hibernate.org/viewtopic.php?f=1&t=1024394
        https://hibernate.atlassian.net/browse/HHH-7605
     -->
    <hibernate.version>4.1.2.Final</hibernate.version>