Improve modularity of jinja2 extensions

Change-Id: I86549a7a5002fa88008a4debfa4b5cf15a756c06
diff --git a/lib/xos-genx/xosgenx/jinja2_extensions/__init__.py b/lib/xos-genx/xosgenx/jinja2_extensions/__init__.py
new file mode 100644
index 0000000..659f440
--- /dev/null
+++ b/lib/xos-genx/xosgenx/jinja2_extensions/__init__.py
@@ -0,0 +1,2 @@
+from .django import *
+from .base import *