[BUGFIX] Move file migration operation created empty folders (Revision 1)

When the "oldPath" didn't exist the operation still created the empty "newpath".

Change-Id: I7642f5f0a3537cc9ecf352637ecd8ce0c180bae4
Related: NEOS-390
Releases: master
Revision-Id: 29c2085c435c85f9792b96de9759a33e60df2c57