[CORD-2080] Adding 'tosca_key' support in xproto

Change-Id: I2c27e4a43140ddecb38f09a33494e5b3ab694059
(cherry picked from commit c3c0f0af175f08a58f5e48956ff56a4779c2c8de)
diff --git a/lib/xos-genx/xosgenx/jinja2_extensions/__init__.py b/lib/xos-genx/xosgenx/jinja2_extensions/__init__.py
index 79af1ec..a81dcb6 100644
--- a/lib/xos-genx/xosgenx/jinja2_extensions/__init__.py
+++ b/lib/xos-genx/xosgenx/jinja2_extensions/__init__.py
@@ -18,3 +18,4 @@
 from .base import *
 from .fol2 import *
 from .gui import *
+from .tosca import *