Fix numpy 1.9 compatibilty
Fix numpy 1.9 compatibilty

numpy.random.randint(..., dtype='int64') is not supported in numpy 1.9.
Changed to .astype('int64')

FrancescAlted/PyTables,avalentino/PyTables,FrancescAlted/PyTables,PyTables/PyTables,avalentino/PyTables,PyTables/PyTables,PyTables/PyTables,FrancescAlted/PyTables,avalentino/PyTables