Add Github Org as a Column in Git Access Control

<img width="820" alt="Screen Shot 2020-04-24 at 11 34 34 AM" src="https://user-images.githubusercontent.com/5400156/80230428-ef974d80-861f-11ea-8cc8-efbc01a05157.png">

Add another column after Team Name for Organization on the GitHub tab of the Git Access Control page.

For Gitlab, let's try to use the parent project of the repo as the organization value.

Final Submission Guidelines

Git issue link: https://github.com/topcoder-platform/topcoder-x-ui/issues/314