SP-406, BIS-279: no locks for space and database instance

SVN: 27824

openbis/source/java/ch/systemsx/cisd/openbis/generic/server/dataaccess/db/SampleDAO.java

@@ -86,8 +86,6 @@ public class SampleDAO extends AbstractGenericEntityWithPropertiesDAO<SamplePE>
         {
             sample.setModificationDate(new Date());
         }
-        lockEntity(sample.getDatabaseInstance());
-        lockEntity(sample.getSpace());
         lockEntity(sample.getExperiment());
         lockEntity(sample.getContainer());
         hibernateTemplate.saveOrUpdate(sample);