fix for old version of h5py (2.5.0) as on rnice

xsocs/io/XsocsH5.py

@@ -296,7 +296,7 @@ class XsocsH5(XsocsH5Base):
             for name, node in h5_file[path].items():
                 if (isinstance(node, _h5py.Dataset) and
                         node.dtype.kind in 'iuf' and
-                        node.ndim == 1 and
+                        len(node.shape) == 1 and
                         node.shape[0] == nb_images):
                     # Only get (u)int and float datasets
                     # with same number of values as number of images