Problem
Currently, cBioPortal backend has no defined formatting for it's code. This has resulted in differences in indentation, tabs/spaces, and other formatting issues. This means that the code has no defined look.

Proposed Solution
Adapt Google Java Style Guide found here. This will allow us to add a formatter to our build process using a new GitHub Action. Developers can also add formatter to their IDEs.

Note: The documentation will also need to be updated to reflect this change.