add underlay overlay mapping
diff --git a/opencontrail/files/2.2/config.global.js b/opencontrail/files/2.2/config.global.js
index 0e3f952..20b10cb 100644
--- a/opencontrail/files/2.2/config.global.js
+++ b/opencontrail/files/2.2/config.global.js
@@ -265,3 +265,6 @@
 
 // Export this as a module.
 module.exports = config;
+
+config.features = {};
+config.features.disabled = [];
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