LoadSassena can not be run twice

[mantid-builder]

Original Reporter: Gesner Passos

When testing http://trac.mantidproject.org/mantid/ticket/6644 I have found that you can not execute the LoadSassena twice. To reproduce the error do:

LoadSassena(Filename='example.h5',OutputWorkspace='example')
LoadSassena(Filename='example.h5',OutputWorkspace='example')

Where example.h5 is at this [http://trac.mantidproject.org/mantid/attachment/ticket/6644/example.h5 link]

@jose considered worth creating a ticket for this, because there is a suspection that the algorithm runs into trouble because there is no handling of the case when the WorkspaceGroup has to be overwritten

[mantid-builder]

This issue was originally trac ticket 6792

[mantid-builder]

http://trac.mantidproject.org/mantid/raw-attachment/ticket/6792/example.h5
(uploaded by @jmborr on 2013-03-28T20:52:56)

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http://trac.mantidproject.org/mantid/raw-attachment/ticket/6792/twice.py
(uploaded by @jmborr on 2013-03-28T20:53:44)

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