Fix RAPI in case split query mechanism is used

Let RAPI raise HttpNotFound() in case the item requested is not
found, if luxid serves the query (split query mechanism).
Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>
Signed-off-by: Klaus Aehlig <aehlig@google.com>
Reviewed-by: Klaus Aehlig <aehlig@google.com>

lib/rapi/baserlib.py

@@ -177,13 +177,19 @@ def HandleItemQueryErrors(fn, *args, **kwargs):
 
   """
   try:
-    return fn(*args, **kwargs)
+    result = fn(*args, **kwargs)
   except errors.OpPrereqError, err:
     if len(err.args) == 2 and err.args[1] == errors.ECODE_NOENT:
       raise http.HttpNotFound()
 
     raise
 
+  # In case split query mechanism is used
+  if not result:
+    raise http.HttpNotFound()
+
+  return result
+
 
 def FeedbackFn(msg):
   """Feedback logging function for jobs.