Ensure the startup is completed before calling startupCompleted

Author: sadortun

src/ParseServer.js

@@ -83,10 +83,22 @@ class ParseServer {
     // Note: Tests will start to fail if any validation happens after this is called.
     databaseController
       .performInitialization()
-      .then(() => hooksController.load())
+      .then(async () => await hooksController.load())
       .then(() => {
+        if (cloud) {
+          addParseCloud();
+          if (typeof cloud === 'function') {
+            cloud(Parse);
+          } else if (typeof cloud === 'string') {
+            require(path.resolve(process.cwd(), cloud));
+          } else {
+            throw "argument 'cloud' must either be a string or a function";
+          }
+        }
+      })
+      .then(async () => {
         if (serverStartComplete) {
-          serverStartComplete();
+          await serverStartComplete();
         }
       })
       .catch(error => {