Date are mapped to binary for domain extending anoter one

[bdbogjoe]

env

• Grails 2.5.6
• plugins :
  ** hibernate4:4.3.10
  ** joda-time:1.5
• libs :
  **org.jadira.usertype:usertype.jodatime:2.0.1

I created a simple app to illustration my issue : https://github.com/bdbogjoe/jodatime-binary
After starting app, open H2 db with any SQL browser and you can see that columns are binary in Child table

Other columns in Main or Sample are ok