handler_config: Split out from buildjson

This allows us to build the version-handler without the json
infrastructure.

Change-Id: I8c0a5715cb66f6cbb3e72cb714759f6e11e3f409
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/bmc/version-handler/test/version_mock.hpp b/bmc/version-handler/test/version_mock.hpp
index 80d3748..4cae248 100644
--- a/bmc/version-handler/test/version_mock.hpp
+++ b/bmc/version-handler/test/version_mock.hpp
@@ -1,4 +1,4 @@
-#include "buildjson.hpp"
+#include "handler_config.hpp"
 #include "image_mock.hpp"
 #include "triggerable_mock.hpp"
 #include "version_handler.hpp"