GPU inventory property fields

Changes:
   - Add GPU yaml fields to generate inventory.py.
   - Generate inventory.py for prodution test usage.

Resolves  openbmc/openbmc-test-automation#1136

Change-Id: I0a7d7223862a901a4d56e8d074a4440d20a930df
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/data/inventory.py b/data/inventory.py
index 9d2674d..5cdac4a 100644
--- a/data/inventory.py
+++ b/data/inventory.py
@@ -21,5 +21,10 @@
         "FieldReplaceable",
         "Cached",
         "Functional"
+    ],
+    "gpu":[
+        "PrettyName",
+        "Present",
+        "Functional"
     ]
-}
\ No newline at end of file
+}