Inventory YAML script changes

Fixes:
   - Add new FRU field "Cached" from Cacheable.interface.yaml
   - Fix generated inventory.py file ending space

Resolves openbmc/openbmc-test-automation#415

Change-Id: Ic9d38b3b2854e0ea0a43703f791665881f5c8e01
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/data/inventory.py b/data/inventory.py
index dc7ee9d..51ee185 100644
--- a/data/inventory.py
+++ b/data/inventory.py
@@ -1,13 +1,14 @@
 inventory_dict = {
-    "fru": [
-        "PrettyName", 
-        "Present", 
-        "PartNumber", 
-        "SerialNumber", 
-        "Manufacturer", 
-        "BuildDate", 
-        "Model", 
-        "Version", 
-        "FieldReplaceable"
+    "fru":[
+        "PrettyName",
+        "Present",
+        "PartNumber",
+        "SerialNumber",
+        "Manufacturer",
+        "BuildDate",
+        "Model",
+        "Version",
+        "FieldReplaceable",
+        "Cached"
     ]
-}
\ No newline at end of file
+}