add test for the fixed bug

compiler/tests/circuits/duplicate_name_context.leo

@@ -0,0 +1,13 @@
+circuit Bar {
+    b2: u32
+
+    function add_five(z:u32) -> u32 {
+        return z+5u32
+    }
+}
+
+function main () {
+    let Bar = 66u32;
+    const k1 = Bar{ b2: 30u32 };
+    const k2 = Bar::add_five(55u32);
+}

compiler/tests/circuits/mod.rs

@@ -283,3 +283,11 @@ fn test_define_circuit_inside_circuit_function() {
 
     assert_satisfied(program);
 }
+
+#[test]
+fn test_duplicate_name_context() {
+    let program_string = include_str!("duplicate_name_context.leo");
+    let program = parse_program(program_string).unwrap();
+
+    assert_satisfied(program);
+}