try cp-property codemod for 3.8 (#720)

[CHORE] Add tests for cp-property codemod

Author: rajasegar

test/fixtures/codemod/latest-node/my-app/app/controllers/application.js

@@ -3,6 +3,10 @@ import Ember from 'ember';
 import { assign } from '@ember/polyfills';
 
 export default Controller.extend({
+  fullName: computed('firstName', 'lastName', function() {
+    return `${this.firstName} ${this.lastName}`;
+  }),
+
   actions: {
     foo(object) {
       this.doStuff(object);

test/fixtures/codemod/local/my-app/app/controllers/application.js

@@ -2,6 +2,10 @@ import Ember from 'ember';
 import { merge } from '@ember/polyfills';
 
 export default Ember.Controller.extend({
+  fullName: computed(function() {
+    return `${this.firstName} ${this.lastName}`;
+  }).property('firstName', 'lastName'),
+
   actions: {
     foo(object) {
       Ember.propertyWillChange(object, 'someProperty');

test/fixtures/codemod/min-node/my-app/app/controllers/application.js

@@ -3,6 +3,10 @@ import Ember from 'ember';
 import { assign } from '@ember/polyfills';
 
 export default Controller.extend({
+  fullName: computed('firstName', 'lastName', function() {
+    return `${this.firstName} ${this.lastName}`;
+  }),
+
   actions: {
     foo(object) {
       this.doStuff(object);