CB-10639 Appium tests: Added some timeouts,

Taking a screenshot on failure,
Retry taking a picture up to 3 times,
Try to restart the Appium session if it's lost

appium-tests/helpers/cameraHelper.js

@@ -1,4 +1,4 @@
-/*jslint node: true, plusplus: true */
+/*jshint node: true */
 'use strict';
 
 var cameraConstants = require('../../www/CameraConstants');