Fix issue in TemplateController and ProfileDAO due to new predefined users

Need to open transaction in ProfileDAO.findByProfileName() because of this
method is called via TemplateController (which is accessing the new predefined
        users).

The new predefined users with a profile are using the method
PredefinedProfiles.getFromDB() that is calling the ProfileDAO.

FEA: ItEr76S30PermissionsEnhancements

libreplan-business/src/main/java/org/libreplan/business/users/daos/ProfileDAO.java

@@ -65,6 +65,7 @@ public class ProfileDAO extends GenericDAOHibernate<Profile, Long> implements
     }
 
     @Override
+    @Transactional(readOnly = true)
     public Profile findByProfileName(String profileName)
         throws InstanceNotFoundException{