utils: rename inventory.py to sw_inventory.py

Rename software inventory file to sw_inventory to better distinguish
it from a future hardware inventory code.

In the future sw_inventory and hw_inventory might be merged together
once each file is tidied up.

src/live/ogOperations.py

@@ -30,7 +30,7 @@ from src.utils.probe import os_probe, cache_probe
 from src.utils.disk import *
 from src.utils.cache import generate_cache_txt, umount_cache, init_cache
 from src.utils.tiptorrent import *
-from src.utils.inventory import get_package_set
+from src.utils.sw_inventory import get_package_set
 
 
 OG_SHELL = '/bin/bash'