New feature: Support rooted descriptors and descriptors under project

Signed-off-by: Philip Joseph <philip.joseph@riftio.com>
diff --git a/common/rw_gen_package.py b/common/rw_gen_package.py
index 7c052f0..1feb5de 100755
--- a/common/rw_gen_package.py
+++ b/common/rw_gen_package.py
@@ -25,10 +25,10 @@
 
 from gi.repository import (
     RwYang,
-    NsdYang,
-    RwNsdYang,
-    VnfdYang,
-    RwVnfdYang,
+    ProjectNsdYang as NsdYang,
+    RwProjectNsdYang as RwNsdYang,
+    ProjectVnfdYang as VnfdYang,
+    RwProjectVnfdYang as RwVnfdYang,
     VldYang,
     RwVldYang
 )