BUG:Modifying group permissions

[omero-qa]

​http://qa.openmicroscopy.org.uk/qa/feedback/3697/

Comment: Currently extending permission of a project to collaborative/read only

java.lang.Exception: org.openmicroscopy.shoola.env.data.DSAccessException: Cannot access data. 
Cannot update the group. 
	at org.openmicroscopy.shoola.env.data.OMEROGateway.handleException(OMEROGateway.java:802)
	at org.openmicroscopy.shoola.env.data.OMEROGateway.updateGroup(OMEROGateway.java:3818)
	at org.openmicroscopy.shoola.env.data.AdminServiceImpl.updateGroup(AdminServiceImpl.java:403)
	at org.openmicroscopy.shoola.env.data.views.calls.AdminLoader$4.doCall(AdminLoader.java:155)
	at org.openmicroscopy.shoola.env.data.views.BatchCall.doStep(BatchCall.java:144)
	at org.openmicroscopy.shoola.util.concur.tasks.CompositeTask.doStep(CompositeTask.java:226)
	at org.openmicroscopy.shoola.env.data.views.CompositeBatchCall.doStep(CompositeBatchCall.java:126)
	at org.openmicroscopy.shoola.util.concur.tasks.ExecCommand.exec(ExecCommand.java:165)
	at org.openmicroscopy.shoola.util.concur.tasks.ExecCommand.run(ExecCommand.java:274)
	at org.openmicroscopy.shoola.util.concur.tasks.AsyncProcessor$Runner.run(AsyncProcessor.java:91)
	at java.lang.Thread.run(Thread.java:680)
Caused by: omero.InternalException
    serverStackTrace = "ome.conditions.InternalException:  Wrapped Exception: (org.springframework.dao.DataAccessResourceFailureException):
                        Hibernate operation: could not insert: [ome.model.meta.Event]; SQL [insert into event (containingEvent, external_id, permissions, experimenter, experimenterGroup, session, status, time, type, id) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)]; ERROR: could not extend relation base/16391/16773: No space left on device; nested exception is org.postgresql.util.PSQLException: ERROR: could not extend relation base/16391/16773: No space left on device
                        	at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:253)
                        	at 

[jburel]

Problem has been fixed so copies of objects are not kept between groups