Flowable-UI: CORS filter- 'Access-Control-Allow-Origin' header is not available.

**Describe the bug**

Flowable-UI: 'Access-Control-Allow-Origin' header is not available for all API calls

Pre-requisite:
Swarm Admin and Instance should be created successfully.
Note down the root credentials.

Steps to be Executed:
Press F12 and navigate to network tab
Login into Flowable Application with root/ admin/ SSO user credentials.
Click task app
Click new task button and create new task
Navigate to dev tools and click any API calls for e.g 'tasks'
Verify 'Access-Control-Allow-Origin' header is displayed for all API calls under network tab in dev tools

**Expected behavior**
Verify 'Access-Control-Allow-Origin' header should be displayed for all API calls under network tab in dev tools.

**Code**
PR- https://github.com/seal-software/flowable-engine/pull/804/files

**Additional context**
Flowable-engine master version of code we are using and did Cors filter changes in our dev branch.
PR - https://github.com/seal-software/flowable-engine/pull/804/files

Kindly check the above PR and help us to enable the CORS filter in flowable-engine.