inventory: Move INVENTORY_ROOT to inventory module

Change-Id: Ic68d4a48ff46002858934e0b9c9b1694a2a17a08
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/pyinventorymgr/obmc/inventory/__init__.py b/pyinventorymgr/obmc/inventory/__init__.py
new file mode 100644
index 0000000..e9a1f83
--- /dev/null
+++ b/pyinventorymgr/obmc/inventory/__init__.py
@@ -0,0 +1 @@
+INVENTORY_ROOT = '/org/openbmc/inventory'