added data to test

Author: francosansone

test/partitioner/external_tools/data/advection_1000.json

@@ -0,0 +1 @@
+{"nodes": [{"id": 1, "interval": [[1, 1]], "lhs": [{"id": "X1", "exp": [[0, 1]], "defs": []}], "rhs": [{"id": "X1", "exp": [[0, 1]], "defs": [1, 2]}]}, {"id": 2, "interval": [[2, 1000]], "lhs": [{"id": "X1", "exp": [[1, 0]], "defs": []}], "rhs": [{"id": "X1", "exp": [[1, 0]], "defs": [1, 2]}, {"id": "X1", "exp": [[1, -1]], "defs": [1, 2]}]}]}