support bitgo test mode

lib/plugins/wallet/bitgo/bitgo.js

@@ -1,4 +1,5 @@
 const BitGo = require('bitgo')
+
 const BN = require('../../../bn')
 
 const E = require('../../../error')
@@ -9,7 +10,8 @@ const userAgent = 'Lamassu-Server/' + pjson.version
 const NAME = 'BitGo'
 
 function buildBitgo (account) {
-  return new BitGo.BitGo({accessToken: account.token, env: 'prod', userAgent: userAgent})
+  const env = account.environment === 'test' ? 'test' : 'prod'
+  return new BitGo.BitGo({accessToken: account.token, env, userAgent: userAgent})
 }
 
 function getWallet (account) {

schemas/bitgo.json

@@ -25,6 +25,15 @@
       "secret": true,
       "required": true,
       "value": ""
+    },
+    {
+      "code": "environment",
+      "display": "Environment (prod or test)",
+      "fieldType": "string",
+      "secret": false,
+      "required": false,
+      "placeholder": "prod",
+      "value": ""
     }
   ]
 }