remove relations when purging models avoid ''NoneType' object has no attribute 'exists'' error when purging models fix my change guewen.baconnier@camptocamp.com-20140203103254-v1mzu2uib047xb9h, wrong lines replaced...
remove relations when purging models
avoid ''NoneType' object has no attribute 'exists'' error when purging models
fix my change guewen.baconnier@camptocamp.com-20140203103254-v1mzu2uib047xb9h, wrong lines replaced...

OCA/server-tools,OCA/server-tools,OCA/server-tools