Fix groupings not being properly resolved

Change-Id: I878ea328acd4e01ec5ea2a7d5a28b22350bb11bd
Bug: https://tree.taiga.io/project/jktjkt-netconf-cli/issue/116
Bug: https://tree.taiga.io/project/jktjkt-netconf-cli/issue/95
diff --git a/example-schema.yang b/example-schema.yang
index 4074172..172f78a 100644
--- a/example-schema.yang
+++ b/example-schema.yang
@@ -28,4 +28,18 @@
         presence true;
     }
 
+    grouping upAndDown {
+        leaf up {
+            type boolean;
+        }
+        leaf down {
+            type boolean;
+        }
+    }
+
+    uses upAndDown;
+
+    container lol {
+        uses upAndDown;
+    }
 }