Errors in test_geospatial_data when run on node of cyclone.

[nick]

4 tests fail when running test_geospatial_data.py on a node using mpirun.

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ERROR: test_find_optimal_smoothing_parameter (__main__.Test_Geospatial_data)
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Traceback (most recent call last):
  File "test_geospatial_data.py", line 1878, in test_find_optimal_smoothing_parameter
    verbose=False)
  File "/d/cit/1/cit/unixhome/nbartzis/anuga/anuga_core/source/anuga/geospatial_data/geospatial_data.py", line 1485, in find_optimal_smoothing_parameter
    G_small, G_other = G.split(split_factor,seed_num, verbose=verbose)
  File "/d/cit/1/cit/unixhome/nbartzis/anuga/anuga_core/source/anuga/geospatial_data/geospatial_data.py", line 697, in split
    random_list.append(remainder_list.pop(i))
IndexError: pop index out of range

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ERROR: test_find_optimal_smoothing_parameter1 (__main__.Test_Geospatial_data)
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Traceback (most recent call last):
  File "test_geospatial_data.py", line 1927, in test_find_optimal_smoothing_parameter1
    verbose=False)
  File "/d/cit/1/cit/unixhome/nbartzis/anuga/anuga_core/source/anuga/geospatial_data/geospatial_data.py", line 1485, in find_optimal_smoothing_parameter
    G_small, G_other = G.split(split_factor,seed_num, verbose=verbose)
  File "/d/cit/1/cit/unixhome/nbartzis/anuga/anuga_core/source/anuga/geospatial_data/geospatial_data.py", line 697, in split
    random_list.append(remainder_list.pop(i))
IndexError: pop index out of range

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ERROR: test if the results from spilt are disjoin sets
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Traceback (most recent call last):
  File "test_geospatial_data.py", line 1812, in test_split
    G1, G2  = G.split(factor,100)
  File "/d/cit/1/cit/unixhome/nbartzis/anuga/anuga_core/source/anuga/geospatial_data/geospatial_data.py", line 697, in split
    random_list.append(remainder_list.pop(i))
IndexError: pop index out of range

======================================================================
ERROR: test if the results from spilt are disjoin sets
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Traceback (most recent call last):
  File "test_geospatial_data.py", line 1836, in test_split1
    G1, G2  = G.split(factor,100)
  File "/d/cit/1/cit/unixhome/nbartzis/anuga/anuga_core/source/anuga/geospatial_data/geospatial_data.py", line 697, in split
    random_list.append(remainder_list.pop(i))
IndexError: pop index out of range

This does not occur when test_all is run on the head node.

[nick]

same as ticket 237