Fix faucet to only autoFaucet first account

app/scripts/keyring-controller.js

@@ -324,6 +324,7 @@ class KeyringController extends EventEmitter {
       if (!firstAccount) throw new Error('KeyringController - No account found on keychain.')
       const hexAccount = normalizeAddress(firstAccount)
       this.emit('newAccount', hexAccount)
+      this.emit('newVault', hexAccount)
       return this.setupAccounts(accounts)
     })
     .then(this.persistAllKeyrings.bind(this))

app/scripts/metamask-controller.js

@@ -79,6 +79,8 @@ module.exports = class MetamaskController extends EventEmitter {
     })
     this.keyringController.on('newAccount', (address) => {
       this.preferencesController.setSelectedAddress(address)
+    })
+    this.keyringController.on('newVault', (address) => {
       autoFaucet(address)
     })