Fix up Get Device ID to use the new return helpers

The Get Device ID rewrite went in before some feedback had come along to
add helper return functions for more readable error codes.

Tested-by: Built and runs Get Device ID as before.

Change-Id: I7e31ad3cff75acb11bda5ee06f60429552a61ed5
Signed-off-by: Vernon Mauery <vernon.mauery@linux.intel.com>
diff --git a/apphandler.cpp b/apphandler.cpp
index e1779bb..78ed077 100644
--- a/apphandler.cpp
+++ b/apphandler.cpp
@@ -602,13 +602,13 @@
             else
             {
                 log<level::ERR>("Device ID JSON parser failure");
-                return ipmi::response(ipmi::ccUnspecifiedError);
+                return ipmi::responseUnspecifiedError();
             }
         }
         else
         {
             log<level::ERR>("Device ID file not found");
-            return ipmi::response(ipmi::ccUnspecifiedError);
+            return ipmi::responseUnspecifiedError();
         }
     }