Deprecate Sensors.py

The pyphosphor package provides equivalent function
so use that and drop the duplicated code.

Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/bin/inventory_items.py b/bin/inventory_items.py
index 1b0fa39..5e53293 100755
--- a/bin/inventory_items.py
+++ b/bin/inventory_items.py
@@ -8,7 +8,7 @@
 import dbus.mainloop.glib
 import cPickle
 import json
-from obmc.dbuslib.propertycacher import PropertyCacher
+import obmc.dbuslib.propertycacher as PropertyCacher
 from obmc.dbuslib.bindings import get_dbus, DbusProperties, DbusObjectManager
 
 if (len(sys.argv) < 2):