MC-19456: Failing Unit Test: paypal/js/view/payment/method-renderer/paypal-express-abstract check smart button initialization.express-checkout-smart-buttons is initialized

- Updated quote data key name due to inconsistency.
- Added jscs ignore for camelcase key value since the that is how the value is store in codebase.

Author: Hwashiang Yu

dev/tests/js/jasmine/tests/app/code/Magento/Paypal/frontend/js/view/payment/method-renderer/in-context/checkout-express.test.js

@@ -35,7 +35,8 @@ define([
         beforeAll(function (done) {
             window.checkoutConfig = {
                 quoteData: {
-                    entityId: 1
+                    /* jscs:disable requireCamelCaseOrUpperCaseIdentifiers */
+                    entity_Id: 1
                 },
                 formKey: 'formKey'
             };