only add & deploy fifs register if it's actually a non live env

lib/modules/ens/index.js

@@ -286,6 +286,7 @@ class ENS {
 
     if (this.registration && this.registration.rootDomain) {
       // Register root domain if it is defined
+      if (this.isDev || this.env === 'privatenet' || this.env ==='development') {
         const rootNode = namehash.hash(this.registration.rootDomain);
         config.default.contracts['FIFSRegistrar'] = {
           "deploy": true,
@@ -302,6 +303,7 @@ class ENS {
           ]
         };
       }
+    }
     config.privatenet = config.development;
     this.embark.registerContractConfiguration(config);