Populate OS variants if an api >= 15 is present
[ganeti-local] / lib / rapi /
drwxr-xr-x   ..
-rw-r--r-- 783 __init__.py
-rw-r--r-- 7763 baserlib.py
-rw-r--r-- 5804 connector.py
-rw-r--r-- 20433 rlib2.py