add status:409 test to test_api_publications_add

tests/test_pub1c-rest.py

@@ -142,3 +142,8 @@ def test_api_publications_add(client):
     data = response.get_json()
     assert data['message'] == 'created'
     assert data['name'] == 'test123'
+    # add same publication
+    response = client.put(path=endpoint, data={'name': 'test123'})
+    assert response.status_code == 409
+
+