Moving huawei YANG model to /models, also removing the redundant YANG which are redundant now.

Change-Id: I10bf58aa5172807d892173c358a75de1fb206d5a
diff --git a/models/huawei/BUCK b/models/huawei/BUCK
new file mode 100644
index 0000000..301456a
--- /dev/null
+++ b/models/huawei/BUCK
@@ -0,0 +1,5 @@
+
+yang_model (
+  app_name = 'org.onosproject.models.huawei',
+  title = 'Huawei YANG Model',
+)