Use testnet for all envs for now

app/services/kredits.js

@@ -38,10 +38,8 @@ export default Ember.Service.extend({
       return this.get('kreditsContractInstance');
     }
 
-    let chain = {development: 'testnet', staging: 'testnet', production: 'main'}[config.environment];
-    let contract = kreditsContracts(this.get('web3'), chain)['Kredits'];
+    let contract = kreditsContracts(this.get('web3'), config.ethereumChain)['Kredits'];
 
-    window.Kredits = contract;
     this.set('kreditsContractInstance', contract);
     return contract;
   }.property('web3'),

config/environment.js

@@ -21,7 +21,8 @@ module.exports = function(environment) {
       // when it is created
     },
 
-    web3ProviderUrl: "https://parity.kosmos.org:8545"
+    web3ProviderUrl: "https://parity.kosmos.org:8545",
+    ethereumChain: "testnet"
   };
 
   if (environment === 'development') {