Update parse SDK to 2.0.0 (#4925)

* WIP: Integrate JS SDK v2

- Removes backbone style callbacks
- Use Promise instead of Parse.Promise

* Fixes ParseObject and ParseRelation

* Updates Parse.Query with promises

* Alls tests should pass

* Ensure a fresh user is used for each test

* Use REST implementation to avoid side effects for username/email duplicates

* Uses js sdk v2

spec/ParseHooks.spec.js

@@ -287,7 +287,7 @@ describe('Hooks', () => {
       promises.push(Parse.Hooks.createFunction("AFunction" + i, "http://url.com/function" + i));
     }
 
-    Parse.Promise.when(promises).then(function(){
+    Promise.all(promises).then(function(){
       for (let  i = 0; i < 5; i++) {
         // Delete everything from memory, as the server just started
         triggers.removeTrigger("beforeSave", "MyClass" + i, Parse.applicationId);
@@ -441,7 +441,7 @@ describe('Hooks', () => {
     }).then(function(res) {
       expect(res.get("hello")).toEqual("world");
       done();
-    }).fail((err) => {
+    }).catch((err) => {
       jfail(err);
       fail("Should not fail creating a function");
       done();
@@ -462,7 +462,7 @@ describe('Hooks', () => {
     }).then(function(res) {
       expect(res.get("hello")).toEqual("world");
       done();
-    }).fail((err) => {
+    }).catch((err) => {
       fail(`Should not fail: ${JSON.stringify(err)}`);
       done();
     });
@@ -485,19 +485,18 @@ describe('Hooks', () => {
       const obj = new Parse.Object("SomeRandomObject");
       return obj.save();
     }).then(function() {
-      const promise = new Parse.Promise();
-      // Wait a bit here as it's an after save
-      setTimeout(() => {
-        expect(triggerCount).toBe(1);
-        new Parse.Query("AnotherObject")
-          .get(newObjectId)
-          .then((r) => promise.resolve(r));
-      }, 500);
-      return promise;
+      return new Promise((resolve) => {
+        setTimeout(() => {
+          expect(triggerCount).toBe(1);
+          new Parse.Query("AnotherObject")
+            .get(newObjectId)
+            .then((r) => resolve(r));
+        }, 500);
+      });
     }).then(function(res){
       expect(res.get("foo")).toEqual("bar");
       done();
-    }).fail((err) => {
+    }).catch((err) => {
       jfail(err);
       fail("Should not fail creating a function");
       done();