Sms integration fix (#130)

* Twilio integration error handling improvement

* Mock-sms error triggering added

lib/plugins/sms/mock-sms/mock-sms.js

@@ -1,8 +1,14 @@
+const _ = require('lodash/fp')
+
 exports.NAME = 'MockSMS'
 
 exports.sendMessage = function sendMessage (account, rec) {
   console.log('Sending SMS: %j', rec)
-  return new Promise(resolve => {
-    setTimeout(resolve, 10)
+  return new Promise((resolve, reject) => {
+    if (_.endsWith('666', _.getOr(false, 'sms.toNumber', rec))) {
+      reject(new Error(`${exports.NAME} mocked error!`))
+    } else {
+      setTimeout(resolve, 10)
+    }
   })
 }