Fix the storage of Major and Minor lists in the database

[Mjtlittle]

This addresses issue #90. There might be a better way to solve this issue, but this will resolve the formatting for now. Ive tested this and it works in my development environment.

Changes

• Stores the list of all majors and minors as a comma separated list within the database when a user registers
  • A, B, C instead of [{"S":"A"},{"S":"B"},{"S":"C"}]
  • Majors are sorted alphabetically before being combined to make requests of the same set of major/minor deterministic
  • This has been resolved on the backend now, instead of the frontend. I prefer to send a list of majors from the frontend as the schema looks cleaner that way.

[Mjtlittle]

Just tested the prod deployment and registering with majors is working as expected. I did this by entering a new user with multiple majors and no minors, and then checked the database to see if it was formatted correctly. The values were correctly sorted and delineated by commas...

Accounting, Agricultural Mechanization and Business