Added bnf when adding a new concept + Started logging filtering

tests/test_concept.py

@@ -20,6 +20,13 @@ def test_i_can_get_concept_key(name, variables, expected):
     assert concept.metadata.key == expected
 
 
+def test_key_does_not_use_variable_when_definition_is_set():
+    concept = Concept("plus").set_prop('plus')
+
+    concept.init_key()
+    assert concept.metadata.key == "plus"
+
+
 def test_i_can_serialize():
     """
     Test concept.to_dict()