inventory: Move INVENTORY_ROOT to inventory module

Change-Id: Ic68d4a48ff46002858934e0b9c9b1694a2a17a08
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/pyinventorymgr/sync_inventory_items.py b/pyinventorymgr/sync_inventory_items.py
index fff0870..72852a5 100644
--- a/pyinventorymgr/sync_inventory_items.py
+++ b/pyinventorymgr/sync_inventory_items.py
@@ -42,8 +42,9 @@
 def get_inv_obj_path(fru_type, fru_name):
     obj_path = ''
     for f in FRUS.keys():
+        import obmc.inventory
         if (FRUS[f]['fru_type'] == fru_type and f.endswith(fru_name)):
-            obj_path = f.replace("<inventory_root>", System.INVENTORY_ROOT)
+            obj_path = f.replace("<inventory_root>", obmc.inventory.INVENTORY_ROOT)
     return obj_path