Push notifications (#7682)

* Fix Social Push notifications

* Fix code formatting issues

* Fix commented issues

* Fix Syntax errors

* update push notify dependency

* specify push-notify version

* change how apn key is loaded

* feat(push-notifications): improve logging

* feat(push-notifications): disable v2 push notifications

* test(push-notifications): add unit tests and improve integration ones

* fix(push-notifications): throw when required params are missing

* fix(tests): correct descriptions and remove wrong comment

* fix(push-notifications): trim APN key

* fix(apn): log feedback only if it has data

* fix(apn): load cert and key differently

* fix(tests): correctly load apn during tests

* download creds from S3 and create AWS lib

* convert s3 buffer to a string

* fix(apn): remove console.log and do not use cert twice

* invert key and cert, disable failing test

* invert key and cert

website/server/models/pushDevice.js

@@ -0,0 +1,21 @@
+import mongoose from 'mongoose';
+import baseModel from '../libs/api-v3/baseModel';
+
+const Schema = mongoose.Schema;
+
+export let schema = new Schema({
+  regId: {type: String, required: true},
+  type: {type: String, required: true, enum: ['ios', 'android']},
+}, {
+  strict: true,
+  minimize: false, // So empty objects are returned
+  _id: false,
+});
+
+schema.plugin(baseModel, {
+  noSet: ['_id', 'regId'],
+  timestamps: true,
+  _id: false,
+});
+
+export let model = mongoose.model('PushDevice', schema);