Fixed the export_test bug. The tests used to fail when the test_graph was not...
Fixed the export_test bug. The tests used to fail when the test_graph was not provided, which is problematic because it means that we need to pull and push a test graph. Now the tests will automatically create a new graph for each test and delete it when the tests are completed. Everything is done in a clean way with no additionnal dependency.
Closes #6 (closed)