Added first implementation of concepts ambiguity resolution + Jenkins file test

tests/core/test_SheerkaSetsManager.py

@@ -239,8 +239,6 @@ class TestSheerkaSetsManager(TestUsingMemoryBasedSheerka):
             Concept("foo"),
             Concept("bar"),
             Concept("baz"),
-            create_new=True
-
         )
 
         sheerka.set_isa(context, foo, bar)
@@ -250,6 +248,18 @@ class TestSheerkaSetsManager(TestUsingMemoryBasedSheerka):
         assert sheerka.isa(bar, baz)
         assert sheerka.isa(foo, baz)
 
+    def test_i_cannot_manage_isa_transitivity_when_using_body(self):
+        sheerka, context, one, another_one, number = self.init_concepts(
+            "one",
+            Concept("another one", body="one"),
+            "number"
+        )
+
+        sheerka.set_isa(context, one, number)
+
+        assert sheerka.isa(one, number)  # sanity
+        assert not sheerka.isa(another_one, number)  # Correct this misbehaviour when BuiltinConcepts.IS is implemented
+
     def test_concept_expression_recurse_id_is_updated(self):
         sheerka, context, one, number, twenties = self.init_concepts(
             "one",